MXPA00010855A - Benzamide derivative, compositions containing said derivative and use thereof - Google Patents

Abstract

The present invention relates to a new compound of formula (I) with one of the symbols R1, R2, R3, R4 and R5 representing OH, whereas the remaining symbols represent H;to a pharmaceutical composition containing the said compound, and to the use of said compound as antiparasital, anti-bacterial, anti-fungal agent, anti viral agent.

Description

USE OF BENZAMIDE DERIVATIVES AS PARASITARY, ANTIBACTERIAL, ANTIVIRAL AND ANTIFUNGIC AGENTS.

EXTRACT OF THE INVENTION The present invention relates to a new compound of the formula I with one of the symbols R, R_, Ri, Rj and Rs representing OH, while the remaining symbols represent H; to a pharmaceutical composition containing said compound, and to the use of said compound as antiparasitic, antibacterial, antifungal and antiviral agent.

THE PREVIOUS TECHNIQUE The nitrothiazole compound PH 5776 (2-acetyloxy) -N- (5-n? Tro-2-t? Azole) -benzamide) is a compound of the formula I where Ri = 0-COCH3 R = R3 = Ra = R5 = H The preparation and uses of this compound (hereinafter referred to as Compound B - formula II) are described in U.S. Patent No. 3,950,351, as well as in the publication made by the Applicant. In U.S. Patent No. 3,950,351 compound B of formula II is prepared by the reaction of Hal Haluro This reaction is not appropriate for the preparation of the pure compound of formula I in which one of the symbols R, R, RT, R and R5 represents OH, while the remaining symbols represent H in addition, contrary to what might be expected from the prior art, for example, that the presence of an acyloxy group was necessary to make the compound active and efficient against bacteria, parasites, etc., it has now been found that the compound of the formula I with one of the symbols Ri, R ^, R3, Rj and R3 representing OH, while the remaining symbols represent H, had an excellent efficiency against parasites, bacteria, fungi, although this does not contain an acyloxy group. The said compound I had a substantially immediate action against parasites, fungi and bacteria. It has now been found that said compound was active against virus.

It has also been found that the composition containing the compound I also advantageously contains a wetting agent. The most preferred compositions are those that contain a wetting agent and a starch derivative. Tests performed by the Applicant have also shown that by simultaneously using the compound of the invention and a wetting agent, the efficiency of the compound is drastically increased, and that by using such a mixture, it is possible to treat conditions of the lower abdomen, such as as intestinal diseases (diarrhea), gastrointestinal infections, enteric infections, sexually transmitted infections, vaginal infections and urogenital infections. The invention therefore also relates to a composition for combating conditions of the lower abdomen, said composition containing: * an effective amount of an active agent of the formula * a wetting agent, said composition preferably also comprising a starch derivative.

BRIEF DESCRIPTION OF THE INVENTION The present invention relates to a new compound C of the formula I wherein one of the symbols RL, R, R3, R < and s represents OH, while the remaining symbols represent H. Preferably, Ri = OH The invention also relates to a pharmaceutical composition comprising as active agent, a compound of the formula as described hereinabove, preferably a compound of the Formula I in which Ri = OH (formula III) According to one embodiment, the composition comprises, as an active agent, a mixture of compound A of the formula with R = OH and R2 R4 and Such a composition combines a substantially immediate action against parasites, fungi, bacteria, viruses, or a substantially immediate treatment of the intestinal condition and a somewhat delayed action or treatment.

Such a composition is thus suitable for the treatment of human conditions or for the prevention of human conditions, such as parasitic infections, bacterial infections, fungal infections, diarrhea and other intestinal conditions, such as conditions due to viruses. In said composition, the weight content of compound A of formula III with respect to the weight of the mixture of compound A of formula III and compound B of the formula it is between 0.5 and 20%, preferably between 0.5 and 10%, more preferably between 0.5 and 5%. The invention also relates to the use of a compound according to the invention, especially a composition according to the invention as antiparasitic agent, antibacterial agent, antifungal agent, antiviral agent. The composition may also contain active agents, such as anthelmintic agents, and antiviral agents, etc. The composition may also contain a wetting agent and / or a starch derivative and / or an excipient. A composition, preferably a solid composition for oral administration to combat conditions or infections of the lower abdomen, preferably intestinal and vaginal conditions, contains: * an effective amount of Compound B of the formula * a wetting agent, and possibly, but preferably * at least one starch derivative. The latter composition may also contain other active agents, for example an anthelmintic agent such as febantel, praziquantel, levamisole, albendazole, oxfendazole, moxidectin, vermectin, milbemycins, etc. The preparation and use of compound B is described in U.S. Patent Nos. 3,950,351 and 4,315,018. The wetting agent present in the composition containing compound C of the formula (such as compound A) and / or compound B , is advantageously an ammonium surfactant, and is preferably selected from the group consisting of sugar esters, polyoxyethylene, polyoxypropylene, anhydrohexitol derivatives, fatty alkanol amides, amide oxides fat, sucrose, mannitol, sorbitol, lecithins, pilivinyl dyrrolidones, fatty acid esters, sucrose glycepto, xylose esters, polyoxyethylene glycends, fatty acid esters and polyoxyethylene ether of fatty alcohols and sorbitan esters of polyoxyethylene fatty acid, esters of polyoxyethylene of sorbitan fatty acids, polypolyglucides, esters of polyglucides of alcohol and mixtures thereof. Particularly suitable wetting agents are sucrose distearate, PVP (polyvinylpyrrolidone), etc. The composition according to the invention preferably contains a starch derivative, especially a carboxylic starch derivative, such as carboxymethyl starch, a sodium derivative thereof or a salt thereof. The composition contains, for example, up to 20% by weight, advantageously from 1 to 10% by weight of surfactant with respect to the weight of the agent or active agents, and up to 20% by weight, advantageously 1 to 10% by weight of the derivative of starch with respect to the weight of the agent or active agents. The invention also relates to a pharmaceutical formulation for oral administration against viruses and / or to combat disorders of the abdomen. lower, such as intestinal, vaginal or urogenital conditions or disorders, said pharmaceutical formulation comprising a core containing a composition containing: * an effective amount of an active agent of compound C and / or compound A and / or compound B, * a wetting agent, and possibly, but preferably * a starch derivative or a salt thereof, the water content of said composition is less than 25% by weight, the core preferably being coated by a membrane. Such a membrane may be a more soluble membrane in the acid gastric medium, but soluble in the intestine. Preferred compositions, wetting agents, etc. of the pharmaceutical formulation are those described hereinabove for the composition according to the invention. The invention also relates to the use of the composition or pharmaceutical formulation for the treatment of diarrhea, for the treatment of liver disorders, etc. The invention also relates to an ointment or gel, cream or suppositories for the treatment of organs of the lower abdomen, such as conditions or disorders vaginal or urogenital, disorders of the rectum, etc. The ointment, preferably in the form of a gel, comprises a compound of the formula I and / or compound B, a wetting agent, as well as an excipient. The wetting agent is preferably one of those listed above for the composition and / or the pharmaceutical formulation. Furthermore, the invention relates to an antibacterial composition containing a compound C of the formula I and / or compound B, and a wetting agent. Such a composition is active against aerobic as well as anaerobic bacteria, the composition thus having a very large spectrum of activity. The invention thus also relates to a process for killing bacteria or for preventing the presence or growth of bacteria in a medium. In said process, the bacteria or the medium are treated with a bactericidal composition according to the invention, for example by spraying the composition on the bacteria, by immersing a support within a medium, etc. The invention also relates to a process for treating diarrheal diseases of animals, preferably humans, in which a composition containing: * an effective amount of an active agent of compound C and / or of compound B * a wetting agent * a starch derivative. The invention also relates to a food composition such as a food dough or a yogurt, comprising as preservative, an effective amount of a compound C of formula I (preferably compound A) and / or compound B) * possibly, but advantageously, a wetting agent, and possibly, but preferably together with a wetting agent; * a starch derivative.

DESCRIPTION OF THE DRAWINGS Figure 1 is the UV spectrum of compound A of formula III Figure 2 is the IR spectrum of compound A of formula III, and Figure 3 is the mass spectrum by high-resolution liquid chromatography (HPLC) of compound A of formula III.

DESCRIPTION OF THE INVENTION The preparation of the pure compound of the formula wherein one of the symbols R, R, R3, R, and Rs represents OH, while the remaining symbols represent H, can be made from the compounds of formula I in which one of the symbols R, R, F, R and Ra is an acyloxy group, while the remaining symbols represent hydrogen.

The said compound is suspended in a weak mixture of hydrochloric acid and water. The compound thus treated is then filtered and washed with water. The washed compound is then possibly dried.

EXAMPLE OF PREPARATION Preparation of compound A A specific preparation mixture is given below: 2 g of 2- (acetyloxy) -N- (5-n? Tro-2-t? Azole) -benzamide (for example PH 5776) - the compound B prepared according to The method described in US Patent No. 3,950,351 is suspended in 20 ml of a 37% hydrochloric acid solution. The medium was maintained at 50 ° C for 24 hours and slowly stirred. After said treatment, the medium was filtered to obtain solid particles. The particles were then washed with water until pH 7, and dried in an oven at 50 ° C. The resulting product appears as yellow microcrystalline needles, the melting point of which was 254 ° C (melting point measured according to the capillary determination in a Mettler FP apparatus).

The structural identification was carried out by centesimal analysis, ultraviolet spectrum (see figure 1), infrared spectrum (see figure 2), mass spectrum by gas chromatography (see figure 3). The results of this identification are: CIO, H7, N3, 04, SI; 258 Calculated: C 46.51% H 2.71% N 16.40% S 12.40% Found: 45.98% 2.63% 16.71% 12.67%? -a = 350 nm (OD = 0.605).

TEST 1 Preparation of the composition O A composition according to the invention has been prepared by mixing PH 5776 the compound prepared hereinabove, the content by weight of said compound with respect to the weight of the compound and of PH 5776 is 4%.

Composition Al 100 g of nitazoxane (PH 5776) in 100 ml of water were mixed with 10 g of polyvinylpyrrolidone (agent humectant) and 5 g of carboxymethyl-starch. The mixture was dried in a vacuum. The composition can then be used for the manufacture of granules, sacks, tablets or capsules for oral or oral administration, composition Al, except that only 5 g and 2 g of polyvinyl pyrrolidone, and 2 g and 1 g of carboxymethyl starch were used. The following table gives the content in grams of nitazoxanide "N", polyvinylpyrrolidone "pvp" carboxymethyl-starch "CS" of the compositions.

Compositions Hl, II, Jl The compositions containing nitazoxanide, as well as yet another active agent, have been prepared by preparing an aqueous medium containing PVP and carboxymethyl starch, and by adding nitazoxanide and another active agent, to the medium. The medium was then dried to obtain a water content of less than 5%.

Composition N PVP CS Other Content g g g active agent water g Hl 50 5 2 Pra zi- 2 cuantel 50 11 75 5 2 Prazi- 1 cuantel 50 Jl 75 5 1 Pra.i- 2 cuantel 50 Compositions A2 to J2 Compositions similar to the compositions Al a Jl. The compositions A2 to J2 differ from the compositions Al to Jl solely by the fact that __tas contain a mixture of nitazoxamide (PH 5776 compound B) and compound A of the formula: (instead of itazoxanide only in compositions Al - Jl). The following table gives the amount of compounds A and B, which have been used for the preparation of composition A2-J2.

Composition Compound A (g) Compound B (g) A2 - G2 4 96 H2 2 48 12 3 72 J2 3 72 Preparation of Pharmaceutical Formulations Formulation Kl 500 g of nitazoxanide powder are dissolved with g of polyvinyl pyrrolidone, 20 g of carboxymethyl starch, 25 g of corn starch, 5 g of magnesium stearate and 50 g of water, and the mixture thus obtained was then formed into 560 mg granules (for example granules which they contain 500 mg of active agent). The granules having a diameter of approximately 1 cm were then dried at approximately 50 ° C. The microgranules thus obtained were then provided with a coating obtained by spraying a hot sugar solution. The sugar coating formed a membrane.

Formulation K2 A powder mixture of 480 g of itazoxanide (PH 5776) and 20 g of compound A was mixed with 10 g of polyvinyl pyrrolidone, 20 g of carboxymethyl starch, 25 g of corn starch, 5 g of magnesium stearate and 50 g of corn starch. g of water, the mixture thus obtained was then formed into granules of 560 mg (for example granules containing 500 mg of active ingredient). The granules having a diameter of approximately 1 cm were then dried at approximately 50 ° C. The microgranules thus obtained were then provided with a coating obtained by spraying a hot sugar solution. The sugar coating formed a membrane. It is obvious that microgranules may also contain one or more excipients or other active agents, such as microcpstalin cellulose (Avicel ® FMC), methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, starch, etc.

In the same way, the membrane can also comprise: * a pharmacologically acceptable excipient such as a plasticizer, a pigment, a filler, a wetting agent, a lubricant, etc. or a mixture thereof, and * a film-forming composition comprising a substance insoluble in gastric acid, but whole-soluble (polymeric substance or not, for example, cellulose acetophthalate, polyvinyl acetophthalate, hydroxypropylmethylcellulose, etc.) .

TESTS PROOF I During phase I, a pharmacokinetic study was carried out on 6 volunteers who received a single oral dose of 500 mg of composition 0. They could be assessed in the blood approximately 3 μg / ml of 2- (hydroxy) -N- ( 5-n? Tro-2-t? Aolol) -benzamide by High Pressure Liquid Chromatography. This product was also excreted without change in the urine during the first 24 hours after treatment. There were no traces of 2- (acetyloxy) -N- (5-n? Tro-2-t? Aolol) -benzamide in the blood and urine. During Clinical Phase II, the studies were conducted in a total of 80 patients, the repeated fecal examinations after the treatment and / or vaginal smears revealed that 500 mg of the composition Al given twice a day for 3 to 7 consecutive days, was highly effective (60- 95%) against Trichomonas vagmalis, Entamoeba histolytica, Giardia lamblia, Enterobius vermicularis, ñscaris lumbricoides, Necator americanus, Ancylostoma duodenale, Trichuris trxchiura, Strongyloides stercoralis, Taema saginata, Taema solium, Diphyl obot tp um l a t um e Hymenol epi s nana. The tolerance was good, only a little epigastric pain, nausea, vomiting and diarrhea were observed in approximately 19% of the patients, depending on the duration of the treatment. The blood chemistries of the blood biome carried out before and after the treatment remained unaffected by the composition. In vitro studies against Tri chomonas vagmali s have shown that while 2- (acetyloxy) -N- (5-n? Tro-2-t? Azole) -benzamide had a Minimum Inhibitory Concentration of 0.5 to 1.25 μg / ml, 2- (hydroxy) -N- (5-n? tro-2-t? azole) -benzamide under the same experimental conditions showed 1 to 1.25 μg / ml. This is showing that 2- (hydroxy) -N- (5-n? Tro-2-t? Azole) -benzamide had an antiparasitic activity equivalent to that of 2- (acetyloxy) -N- (5-n) tro-2-t-azole) -benzamide. However, these studies showed that 2- (hydroxy) -N- (5-n? Tro-2-t? Azol? L) -benzamide had a substantially immediate action, which was not the case for 2- (acetyloxy) -N- (5-n? Tro-2-t? Azole) -benzamide. Finally, in vitro studies have shown that the composition was effective against aerobic gram-positive and gram-negative bacteria such as Stap yl ococcus a ureus, Eschep chi a coli, Shigella sonei, Hel i cobac ter pyl op; anaerobic bacteria such as Bacteroides fragilis, Fusobacterium ulcerans, Veillonella alkdescens, Gardnerella vagmalis, yeast and fungal dermatophytes such as Trichop yton mentagrop ytes, Microsporum audovim, Epidermophyton flocosum and Candida albicans. By using a compound of formula I in which one of the symbols Ri, R2, RJ, R4 and R3 represent OH, while the remaining symbols represent H, preferably a compound A, even in a very low amount, it was possible to increase the efficiency of the compound of the formula , especially of the compound PH 5776, or of the compound B.

EVIDENCE 2 AND 3 In order to show the effectiveness of the composition according to the invention, two were tested groups of 5 mice (4 to 8 weeks of age, 18 to 20 grams each), both groups being infected with Cryptospopdium parvum. The infected mice suffered from chronic diarrhea. Before treatment, it was easy to determine mice suffering from chronic diarrhea by faecal analysis. The treatment was carried out by using the DI composition of the nitazoxanide described hereinabove. Mice suffering from chronic diarrhea received by oral priming for one week, approximately 0.01 g of nitazoxanide each day (for example about 0.6 g / kg of body weight of the mice). After one week of treatment, it was no longer possible to determine by fecal analysis that group of mice first suffered from diarrhea. The infected mice were also treated by the use of composition D2. Said mice received by oral priming for one week, each day approximately 0.0096 g of nitazoxanide and approximately 0.0004 g of compound A of formula III.

Before the end of a week of treatment, it was no longer possible to determine by fecal analysis that the group of mice first suffered from diarrhea.

EVIDENCE 4 and 5 Aqueous compositions (100 g) containing 10 g of an active agent have been prepared. For the composition containing nitazoxanide or a mixture of nitazoxanide (9.6 g) and compound A as the active agent, the composition also contained 0.5 g of sucrose distearate. The compositions have been used for the treatment of various parasites, helminths, bacteria and fungi. The activity of the compositions is given in the following table: ACT IVITY OF Pl P2 P3 P4 P5 Protozoapos Trichomonas vagipalis + + No No + Tpchomoaas mtestinalis + + No No + In tamoeba histolytica + + No No + In tamoeba dispar + + No No -1- ACTIVITY OF P P2 P3 P4 P5 Protozoapos Tri c orno na vaginal s + + No No + Trichomonas mtestinalis + + No No + Entamoeba coli + + No No + Endolimax nana + + No No + Balantidium coli + + No No + Dientamoeba fr agí lis + + No No + Giardia lamblia + + No No + Isospora belli + + + / - No + Cryptospopdium parvum + + No No No Bladtocystis hominis + + No No No Enterocytozoon bieneusí + + No No + Sep tata intestinalis + + No No No Helminths Enterobias vermicula is + + + + No As caris lumbpcoides + + + + No Necator amepcanus + + + + No Ancylostoma duodenale + + + + No Tpcnups trichiura + + + + No Taema s agina t a + + No No No Taenia solium + + No No No ACTIVITY OF P P2 P3 P4 P5 Protozoa ios Tzichomonas vagmalis + + No No + Tpc omonas mtestinalis + + No No + Hymenolepis nana + + No No No Pl = Nitazoxanide + sucrose distearate P2 = Nitazoxanide + Compound A + Sucrose Distearate P3 = Albendazole P4 = Mebendazole P5 = Metronidazole ACTIVITY OF P P2 P3 P4 P5 Aerobic bacteria Staphylococcus aureus + + No No No Escherichia coli + + No No No Prote s vulgaris + + No No No Anaerobic bacteria Clostpd uip sp. + + No No + Bacteroldes sp. + + No No + Peptococcus sp. + + No No + Peptostzeptococcus SPP + + No No -I- Fu.ojbac teriutp SPP + + No No + Fungi Candida alb cans + No No No ~~ c pn to e? cagr. p tees + + + No No Microsporum audovmi + + + No No Epidermophyton flocosum + + + No No Pl = Nitazoxanide + sucrose distearate P2 = Nitazoxanide + Compound A + Sucrose Distearate P3 = Albendazole P4 = Mebendazole P5 = Metro idazole PROOF 5 The general procedures for the determination of Antiviral Efficacy and Toxicity are given hereinafter.

Laboratory Procedures for the Determination of Antiviral Efficacy and Toxicity A. Preparation of Human Foreskin Fibroblasts Cells Human neonatal foreskins were obtained as soon as possible after circumcisions were performed, and were placed in minimal essential medium (MEM) containing vancomycin, fungizone, penicillin and gentamicma, at the usual concentrations, for four hours. The medium was then removed, the foreskins were cut into small pieces and washed repeatedly until the red cells were no longer present. The tissue was then trypsinized using 0.25% trypsin with continuous agitation for 15 minutes at 37 ° C in a C02 incubator. At the end of each 15 minute period the tissue was allowed to settle to the bottom of the flask. The supernatant containing cells was emptied through sterile gauze into a flask containing MEM and 10% fetal bovine serum. The flask containing the medium was kept on ice throughout the tppsinization process. After each addition of the cells, the gauze was washed with a small amount of serum containing MEM. Fresh trypsin was added each time to the foreskin pieces and the procedure was repeated until no more cells were available. The medium containing cells was then centrifuged to 1,000 r.p. . at 4 ° C for ten minutes. The liquid supernatant was discarded and the cells were resuspended in a small amount of MEM with 10% FBS (Fetal Bovine Serum). The cells were then placed in an appropriate number of 25 cm2 tissue culture flasks. As the cells became confluent and needed tppsinization, they were gradually expanded into larger flasks. The cells were maintained on vancomycin and fungizone at passage four.

B. Cytopathic Inhibition Inhibition Assay - HSV, HCMV, VZV Human low-foreskin fibroblast cells were seeded in 96-well tissue culture plates, 24 hours before use, at a cell concentration of 2.5 x 104 cells per ml in 0.1 ml of minimal essential medium (MEM) supplemented with 10% fetal bovine serum (FBS). The cells were then incubated for 24 hours at 37 ° C in a CO incubator. . After incubation, the medium was removed and 100 μl of MEM containing 2% FBS was added to all except the first row. In the first row, 125 μl of the experimental drug was added in wells in triplicate. The medium was only added to the cell wells and control with virus. The drug in the first row of wells was then serially diluted 1: 5 throughout the remaining wells by transferring 25 μl using the Cetus Liquid Handling Machine. After dilution of the drug, 100 μl of the appropriate concentration of virus was added to each well, excluding the cell control wells, which received 100 μl of MEM. For the HSV-1 and HSV-2 assays, the concentration of the virus used can be 1,000 plaque forming units (PFU) per well. For the CMZ and VZV assays, the aggregate virus concentration can be 2,500 PFU per well. The plates were then incubated at 37 ° C in a C02 incubator for three days for HSV-1 and HSV-2, or 10 days for VZV, or 14 days for CMV. After the incubation period, the media was aspirated and the cells were stained with 0.1% crystal violet solution for 30 minutes. The dye was then removed and the plates rinsed using tap water until all the excess dye was removed. The plates were allowed to dry for 24 hours then read on a Skatron plate reader at 620 nm.

C. Plate Reduction Test for HSV-1 HSV-2, using Capa? Two days before use, the HFF cells (Human Foreskin Fibroblasts) were placed in six-well plates and incubated at 37 ° C with 5% C02 and 90% humidity. At the date of the assay, the drug is constituted at twice the desired concentration in 2x MEM and then serially diluted 1: 5 in 2x MEM and then serially diluted 1: 5 in 2x MEM, using six concentrations of the drug. The initial concentration is usually 200 μg / ml to 0.06 μg / ml. The virus to be used is diluted in MEM containing 10% FBS to a desired concentration, which will give 20-30 plates per well. The medium is then aspirated from the wells and 0.2 ml of the virus is added to each well in duplicate, with 0.2 ml of the medium that is added to the drug toxicity wells. The plates are then incubated for one hour with shaking every fifteen minutes. After the incubation period, an equal amount of 1% agarose was added to an equal volume of each dilution of the drug. This will give final drug concentrations starting with 100 μl / l and ending with 0.03 μg / ml, and a final concentration of the agarose layer of 0.5%. The drug-agarose mixture is applied to each well in volumes of 2 ml, and the plates are then incubated for three days, after which the cells were stained with a 1.5% neutral red solution. At the end of the incubation period of 4-6 hours, the dye is aspirated, and the plates are counted using a stereo icroscope at a magnification of 10x. EC or (50% effective concentration) is the concentration required to inhibit viral cytopathogenicity by 50%. IC; 3 (inhibitory concentration of 50%) is the concentration required to inhibit cell proliferation by 50%. selective index (S.I.) = IC0 / EC.).

D. VZV Plate Reduction Test - Semi-Solid Layer The procedure is essentially the same as for the HSV plate assay described above, with two exceptions: 1. After the drug is added, the plates are incubated for ten days. 2. On days three and six, an additional 1 ml of the layer is added with equal amounts of 2x MEM and 1% agarose.

E. CMV Plate Test - Semisolid Layer The procedure again is almost the same as for HSV, with minor changes. The agarose used for the initial layer and the two subsequent layers is 0.8% instead of 1%. The assay is incubated for 14 days with the additional 1 ml layers, which are applied on days four and eight.

F. Plate Reduction Tests Using Liquid Media Layer The procedure for the liquid layer plate test is similar to that used by the agarose layer.

The procedure for adding the virus is the same as for the regular plate assay. The area concentration of the drugs is to be used in MEM with 2% of FBS. The drugs are not constituted at 2x concentration as in the previous tests, but are constituted at the desired concentration. For the HSV-1 and HSV-2 assays, an antibody preparation obtained from Baxter Health Care Corporation is diluted 1: 500 and is added to the medium in which the drug is diluted. For CMV and VZV, no antibody is used in the cap. For the CMV test, additional medium is added with new drug on day five, and allowed to incubate for a total of 10 days. For VZV, additional medium is added on day five, and incubated for a total of 10 days. At the end of the incubation period for all assays, 2 ml of a 1:10 dilution of neutral reserve is added to each well, and incubated for six hours. The liquid is then aspirated and the plates are enumerated using a stereomicroscope.

G. Selection and Confirmation Tests for EBV 1. Virus There are two prototypes of infectious EBV. One is exemplified by the virus derived from the supernatant fluids of the P3HR-1 cell line. This cell line produces non-transforming viruses that cause the production of the early antigen (EA) after primary infection or superinfection of B-cell lines. The other prototype is exemplified by the B-95-8 virus. This virus immortalized blood lymphocytes of the spine and induced tumors in tifies. This however does not induce an infection producing abortion even in cell lines that harbor copies of the genome of EBV. The virus used in the present assays is P3HR-1. 2. Cellular Lines Ramos is an exceptional B cell line, derived from the Burkitt lymphoma tumor, but which contains no detectable EBV genomic copies and is negative for EBNA. Ramos / A was obtained by in vitro infection of Ramos with the P3HR-1 virus and contains a copy of the resident EBV genome per cell. Raj i is a cell line of the Burkitt form that contains 60 EBV genomes per cell, and will be the primary cell used to evaluate the antiviral activity against EBV EA expression. Daudí is a low-level producer that contains 152 copies of the EBV genome per cell. This spontaneously expresses the EBV EA in 0.25-0.5% of the cells. This will be used in follow-up studies to confirm the activity. These cell lines respond to EBV supepfection by the expression of EA (D), EA (R) and VCA. All cell lines are maintained in RPMI-1640 medium supplemented with 10% FCS, L-glutamine and 100 μg / ml gentamicin. The crops are fed twice each week and the cell concentration is adjusted to 3 x lOVml. The cells are maintained at 37 ° C in a humidified atmosphere with 5% C023. Immunofluorescence Assays with Monoclonal Antibodies The cells are infected with the EBV P3HR-1 strain, and the drugs to be tested are added after adsorption (45 minutes at 37 ° C) and washing of the cell cultures. The cultures are incubated for two days in complete medium to allow the expression of the viral gene. After the incubation period of 48 hours, the number of cells in each sample is counted and smears are made. The monoclonal antibodies for the different components of EA and VCA are then added to the incubated and washed cells. This is followed by an anti-mouse Ig antibody, rabbit, conjugated to fluorescein; and, the number of fluorescence-positive cells in the smears is counted. The total number of cells in the cultures positive for EA or VCA, is then calculated and compared.

H. Cell Proliferation Assay - Toxicity Twenty-four hours before the assay, the HFF cells are seeded in 6-well plates at a concentration of 2.5 x 10 4 cells per well in MEM containing 10% FBS. On the day of the assay, the drugs are serially diluted in MEM containing 10% FBS in increments of 1: 5, covering a range of 100 μg / ml to 0.03 μg / ml. For drugs that have been solubilized in DMSO, the control well receives MEM containing 10% DMSO. The medium from the wells is then aspirated and 2 ml of each concentration of the drug are added to each well. The cells are then incubated in a CO ^ incubator at 37 ° C for 72 hours. At the end of this time, the half-drug solution is removed and the cells are washed. One ml of 0.25% trn is added to each well, and incubated until the cells begin to detach from the plate. The cell-medium mixture is then pipetted up and down vigorously to break the cell suspension and 0.2 ml of the mixture is added to 9.8 ml of Isoton III, and counted using a Coulter Counter. Each sample is counted three times with three replicate wells per sample.

I. MTT Assay for Cellular Cytotoxicity Twenty-four hours before the assay, the HFF cells are placed in 96-well plates at a concentration of 2.5 x 10 4 cells per well. After 24 hours, the medium is aspirated and 125 microliters of the drug are added to the first row of wells, and then serially diluted 1: 5 using the automated Cetus Liquid Handling System, in a manner similar to that used in the CPE test. The plates are then incubated in a C02 incubator at 37 ° C for seven days. At this time, each well receives 50 microliters of a solution at 1 μg / ml of MTT in Dulbecco's phosphate buffered saline solution. The plates are then incubated for an additional period of four hours. At this time, the medium is removed and replaced with 100 μl of 0.04 N hydrochloric acid in isopropanol. After stirring shortly, the plates are subsequently read in a plate reader at 550 nm.

J. Neutral Red Uptake Assay - Toxicity The procedure for plaque placement of the cells and the addition of the drug is the same as for the MTT Assay.

After the addition of the drug, the plates are incubated for seven days in a C02 incubator at 37 ° C. At this time, the medium / drug is aspirated, 200 μl per well of 0.01% neutral red in DPBS are added. These are incubated in the C02 incubator for one hour. The dye is aspirated and the cells are washed using a Nunc Plate Washer. After the elimination of the washing with DPBS, 200 μg / well of 50% ETOH (ethanol) / 1% glacial acetic acid (in H20) are added. The plates are rotated for 15 minutes and the optical densities are read at 550 nm in a plate reader.

Test 5a: Antiviral activity against the replication of HBV in cultures (Hepatitis B) The protocol for the assay of anti-HBV compounds in cell cultures 2.2.15, can be summarized as follows (Korba and Milman, 1991, Antiviral Res. 217: 217): * HBV-producing human hepatic cells, chronically (Acs, collaborators, 1987, PNAS 8_4: 4641) are seeded in 24-well tissue culture plates, and grown to confluence.

* The test compounds are then added daily for a continuous period of 9 days. The culture medium (changed daily during the treatment period) is collected and stored for analysis of the extracellular HBV DNA (vipon) after 0, 3, 6 and 9 days of treatment.

* The treated cells are lysed 24 hours after day 9 of treatment for the analysis of the genomic forms of intracellular HBV.

* HBV DNA is then analyzed quantitatively and qualitatively for complete levels of HBV DNA (both extracellular and intracellular DNA) and the relative proportion of replication of HBV (intracellular DNA).

The protocol for the determination of the toxicity of the compounds in cell cultures 2.2.15 can be summarized as follows (Korba and Gepn, sent for publication): * Cells 2.2.15 develop to confluence in tissue culture plates of flat bottom, 96 wells, and treated with the compounds (in 0.2 ml culture medium / well) as described above. Four concentrations of each compound were tested, each in triplicate cultures, in steps of 3 to 10 times.

* Untreated control cultures were maintained on each 96-well plate. In each 96-well plate, wells that did not contain cells were used to correct the diffusion of light.

* The toxicity was determined by the inhibition of uptake of the neutral red dye, determined by absorbance at 510 nanometers relative to the absorbance for the untreated cells (Finter et al., 1969, J. Med. Chem. 5: 419), 24 hours after day 9 of treatment.

The antiviral activity of compound A has been compared with that of zalcitabma. It was found that when compound A is used, the effective concentration (EC5) was 1.8 ± 0.1 microgram / ml (μg / 1) to have a 50% inhibition of viral cytopathogenicity, while the cytotoxic concentration (to have a inhibition of 50% of the cell proliferation) was greater than 1000 μg / ml. The SI selective index for compound A was thus equal to or greater than 1000 / 1.8, for example an index higher than 500. For zalcitabine, the tests showed the following results: EC so: 1.8 + 0.2 μg / ml CC so: 261 ± 24 μg / ml for example, a SI selective index of 261 / 1.8 for example about 145. As can be seen from this text, compound A was less toxic than Zalcitabine, while a more appropriate treatment with fewer side effects, it can be obtained against the replication of HBV.

TEST 5b: Antiviral activity against VZV A mixture of Nitazoxanide (96%) of compound A (4%) was also used in order to determine its activity against a Varicella Zoster virus (a standard laboratory strain). An EC5o of 4 μg / ml and a CC5o of 34 μg / ml was found for the aforementioned mixture against the virus of the Varicella Zoster, for example an index S.I. of about 8.5. In view of the low toxicity and the efficiency of the mixture, the mixture was particularly suitable for the treatment of Varicella Zoster virus, known as resistant to the antiviral agent such as Aciclovi. The compound A and the composition according to the invention can be administered orally, for example by means of tablets. The compositions of the invention, especially those containing PH 5776 and / or an additional antiviral agent, are compositions having a broad spectrum of action on herpes viruses such as: SIMPLE HERPES VIRUS TYPE 1 (HSV-1, HSV- 1 resistant to acyclovir); SIMPLE HERPES VIRUS TYPE 2 (HSV-S, HSV-2 resistant to acyclovir); HUMAN CITOMEGALOVIRUS (HCMV, HCMV resistant to ganciclovir); VIRUS OF VARICELA ZOSTER (VZV, VZV resistant to acyclovir); EPSTEIN BARR VIRUS (EBV); CITOMEGALOVIRUS MURINO (MCMV).

The compositions may contain excipients known as such for the purpose of preparing formulas suitable for oral administration. The compositions advantageously contain a wetting agent, possibly a starch derivative.

Claims (8)

1. R E I V I N D I C A C I O N S 1.- Use of a mixture of a compound A of the formula: with Rx = OH and R2 = R3 = R4 = R5 = H and a compound B of the formula: in the preparation of an antiparasitic medicine.
2. 2.- Use of a compound of the formula I: .._ // », where the symbol Rj. represents OH or OCOCH3, while the remaining symbols R2 to Rs represent H, or mixtures of these compounds, in the preparation of an antibacterial medicament.
3. 3. Use according to claim 2, wherein the antibacterial medicament is a medicament against bacteria selected from the group comprising Staphylococcus aureus, Escherichia coli, Shigella sonei, Helicobacter pylori, Bacteroides fragilis, Fusobacterium ulcerans, Veillonella alkdescens, Gardnerella vaginalis.
4. 4. Use according to claim 3, wherein the antibacterial medicament is active against Helicobacter Pylori.
5. 5. - Use of a compound of the formula I: wherein the symbol Ri represents OH, while the remaining symbols R2 to R5 represent H, in the preparation of an antifungal medicament.
6. 6. - Use of a mixture of a compound A of the formula: with Ri = OH and R2 = R3 = R4 = R5 = H and a compound B of the formula: in the preparation of an antifungal medication.
7. 7.- Use of a compound of the formula: with the s that the remaining symbols R2 to R5 represent H, or a mixture of these compounds, in the preparation of an antiviral drug.
8. 8. - Food composition comprising, as a preservative, an effective amount of an active agent of the formula I: where the symbol Rj. represents OH, while the remaining symbols R2 to R5 represent H, possibly a compound B of the formula and possibly a starch derivative. R E S U E N The present invention relates to a new compound of the formula (I) wherein one of the symbols Ri, R2, R3, R4 and R5 represents OH, while the remaining symbols R2 to R5 represent H; to a pharmaceutical composition containing the compound; and to the use of the compound in the preparation of an antiparasitic, antibacterial, antifungal medication or an antiviral drug.