ES487081A0 - Un procedimiento para la preparacion de derivados polimeros del acido 5-aminosalicilico. - Google Patents

Un procedimiento para la preparacion de derivados polimeros del acido 5-aminosalicilico.

Info

Publication number
ES487081A0
ES487081A0 ES487081A ES487081A ES487081A0 ES 487081 A0 ES487081 A0 ES 487081A0 ES 487081 A ES487081 A ES 487081A ES 487081 A ES487081 A ES 487081A ES 487081 A0 ES487081 A0 ES 487081A0
Authority
ES
Spain
Prior art keywords
procedure
preparation
aminosalicylic acid
polymer derivatives
derivatives
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES487081A
Other languages
English (en)
Other versions
ES8101630A1 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynapol Corp
Original Assignee
Dynapol Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/971,609 external-priority patent/US4190716A/en
Application filed by Dynapol Corp filed Critical Dynapol Corp
Publication of ES487081A0 publication Critical patent/ES487081A0/es
Publication of ES8101630A1 publication Critical patent/ES8101630A1/es
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G85/00General processes for preparing compounds provided for in this subclass
    • C08G85/004Modification of polymers by chemical after-treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/74Synthetic polymeric materials
    • A61K31/785Polymers containing nitrogen
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/74Synthetic polymeric materials
    • A61K31/795Polymers containing sulfur
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/56Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
    • A61K47/58Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. poly[meth]acrylate, polyacrylamide, polystyrene, polyvinylpyrrolidone, polyvinylalcohol or polystyrene sulfonic acid resin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/56Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
    • A61K47/59Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/56Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
    • A61K47/59Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes
    • A61K47/60Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00Chemical modification by after-treatment
    • C08F8/30Introducing nitrogen atoms or nitrogen-containing groups
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00Chemical modification by after-treatment
    • C08F8/34Introducing sulfur atoms or sulfur-containing groups
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32Polymers modified by chemical after-treatment
    • C08G65/329Polymers modified by chemical after-treatment with organic compounds
    • C08G65/334Polymers modified by chemical after-treatment with organic compounds containing sulfur
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • C08G65/48Polymers modified by chemical after-treatment

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
ES487081A 1978-12-20 1979-12-19 Un procedimiento para la preparacion de derivados polimeros del acido 5-aminosalicilico. Expired ES8101630A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/971,609 US4190716A (en) 1978-12-20 1978-12-20 Polymeric agent for releasing 5-aminosalicylic acid or its salts into the gastrointestinal tract
US06/095,411 US4298595A (en) 1978-12-20 1979-11-29 Pharmaceutical preparations containing a polymeric agent for releasing 5-aminosalicylic acid or its salts into the gastrointestinal tract

Publications (2)

Publication Number Publication Date
ES487081A0 true ES487081A0 (es) 1980-12-16
ES8101630A1 ES8101630A1 (es) 1980-12-16

Family

ID=26790195

Family Applications (1)

Application Number Title Priority Date Filing Date
ES487081A Expired ES8101630A1 (es) 1978-12-20 1979-12-19 Un procedimiento para la preparacion de derivados polimeros del acido 5-aminosalicilico.

Country Status (16)

Country Link
US (1) US4298595A (es)
EP (1) EP0013000B1 (es)
AT (1) AT366068B (es)
AU (1) AU535100B2 (es)
CA (1) CA1130281A (es)
DE (1) DE2966737D1 (es)
DK (1) DK541879A (es)
ES (1) ES8101630A1 (es)
FI (1) FI793991A (es)
GR (1) GR68718B (es)
IL (1) IL58969A (es)
IT (1) IT1162426B (es)
MC (1) MC1302A1 (es)
NO (1) NO794171L (es)
NZ (1) NZ192458A (es)
PT (1) PT70615A (es)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960765A (en) * 1980-03-20 1990-10-02 Farmaceutisk Laboratorium Ferring A/S Pharmaceutical composition and method for the treatment of colitis ulcerosa and Crohn's disease by oral administration
WO1981002671A1 (en) * 1980-03-20 1981-10-01 Ferring Farma Lab Pharmaceutical composition and method for the treatment of colitis ulcerosa and crohn's disease by oral administration
WO1984004041A1 (en) * 1983-04-14 1984-10-25 Univ California Colon-specific drug delivery system
GB8401166D0 (en) * 1984-01-17 1984-02-22 Bevaloid Ltd Labelled polymer compositions
US5032572A (en) * 1984-07-18 1991-07-16 Medical College Of Ohio Polymers containing cross-linked azo bonds, which polymers are useful for releasing therapeutic agents into the lower gastrointestinal tract
US4663308A (en) * 1984-07-18 1987-05-05 Medical College Of Ohio Method of use of polymers containing cross-linked azo bonds for releasing therapeutic agents into the lower gastrointestinal tract
US5484605A (en) * 1988-11-25 1996-01-16 Henning Berlin Gmbh Chemie-Und Pharmawerk Agent for treating chronically inflammatory intestinal diseases
BE1003677A3 (nl) * 1990-01-29 1992-05-19 Schacht Etienne Werkwijze voor het bereiden van azobevattende polymeren en het gebruik ervan als geneesmiddelafgiftesystemen.
US5120306A (en) * 1990-03-21 1992-06-09 Gosselin Leon F Direct delivery of anti-inflammatories to the proximal small bowel
US5405919A (en) * 1992-08-24 1995-04-11 The United States Of America As Represented By The Secretary Of Health And Human Services Polymer-bound nitric oxide/nucleophile adduct compositions, pharmaceutical compositions and methods of treating biological disorders
US6468519B1 (en) * 1997-09-10 2002-10-22 Rutgers, The State University Of New Jersey Polyanhydrides with biologically active degradation products
US7122615B1 (en) * 1998-09-10 2006-10-17 Rutgers, The State University Of New Jersey Polyanhydrides with therapeutically useful degradation products
US6486214B1 (en) * 1997-09-10 2002-11-26 Rutgers, The State University Of New Jersey Polyanhydride linkers for production of drug polymers and drug polymer compositions produced thereby
DE19813613A1 (de) * 1998-03-27 1999-09-30 Jochen Kerres Modifiziertes Polymer und modifizierte Polymermembran
US20040038948A1 (en) 1999-12-07 2004-02-26 Uhrich Kathryn E. Therapeutic compositions and methods
US6602915B2 (en) 2000-07-27 2003-08-05 Rutgers, The State University Of New Jersey Therapeutic azo-compounds for drug delivery
DE60115465T2 (de) 2000-08-29 2006-08-03 Nobex Corp. Immunoregulierende verbindungen, deren derivate und ihre verwendung
US8048924B2 (en) 2001-08-29 2011-11-01 Biocon Limited Methods and compositions employing 4-aminophenylacetic acid compounds
WO2004006863A2 (en) * 2002-07-17 2004-01-22 Rutgers, The State University Therapeutic devices for patterned cell growth
WO2005074908A1 (en) 2004-02-06 2005-08-18 Borody, Thomas, Julius Use of aminosalicylates in diarrhoea-predominent irritable bowel syndrome
US20080306029A1 (en) * 2004-05-28 2008-12-11 Salix Pharmaceuticals, Inc. Prevention, Treatment, and Amelioration of Radiation Induced Enteritis
DK1773767T3 (en) 2004-07-07 2016-03-21 Biocon Ltd Synthesis of azo bound in immune regulatory relations
US7452872B2 (en) 2005-08-24 2008-11-18 Salix Pharmaceuticals, Inc. Formulations and uses of 2-hydroxy-5-phenylazobenzoic acid derivatives
US8921344B2 (en) * 2006-11-03 2014-12-30 Salix Pharmaceuticals, Inc. Formulations and uses of 2-hydroxy-5-phenylazobenzoic acid derivatives
JP2009506067A (ja) * 2005-08-24 2009-02-12 サリックス ファーマシューティカルズ, インコーポレイテッド バルサラジドの製剤ならびにその製造および使用
WO2008033125A1 (en) * 2006-09-13 2008-03-20 The Procter & Gamble Company Methods of treatment for ulcerative colitis using aminosalicylate
BRPI0622008A2 (pt) * 2006-09-13 2011-12-20 Procter & Gamble métodos de tratamento para colite ulcerativa
EP2102144A4 (en) 2006-09-13 2011-03-23 Univ Rutgers ACTIVE SUBSTANCES AND THEIR OLIGOMERS AND POLYMERS
US8436051B2 (en) * 2007-06-08 2013-05-07 Aptalis Pharma Canada Inc. Mesalamine suppository
US8217083B2 (en) * 2007-06-08 2012-07-10 Aptalis Pharma Canada Inc. Mesalamine suppository
US7541384B2 (en) 2007-06-08 2009-06-02 Axcan Pharma Inc. Mesalamine suppository
WO2011137103A1 (en) 2010-04-26 2011-11-03 Salix Pharmaceuticals, Ltd. Formulations and uses of 2-hydroxy-5-phenylazobenzoic acid derivatives for the treatment of males
US8741317B2 (en) 2010-08-19 2014-06-03 Rutgers, The State University Of New Jersey Slow-degrading polymers comprising salicylic acid for undelayed and sustained drug delivery
US9144579B2 (en) 2012-08-17 2015-09-29 Rutgers, The State University Of New Jersey Polyesters and methods of use thereof
US20140120057A1 (en) 2012-10-25 2014-05-01 Rutgers, The State University Of New Jersey Polymers and methods thereof for wound healing
US9387250B2 (en) 2013-03-15 2016-07-12 Rutgers, The State University Of New Jersey Therapeutic compositions for bone repair
WO2014194055A1 (en) 2013-05-29 2014-12-04 Rutgers, The State University Of New Jersey Antioxidant-based poly(anhydride-esters)
WO2015191742A1 (en) 2014-06-13 2015-12-17 Rutgers, The State University Of New Jersey Process and intermediates for preparing poly(anhydride-esters)
US10543162B2 (en) 2015-04-10 2020-01-28 Rutgers, The State University Of New Jersey Kojic acid polymers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862312A (en) * 1968-01-08 1975-01-21 Ici Ltd Compositions comprising a resinate of dl- or l-tetramisole, and treatment therewith
US3920855A (en) * 1973-11-30 1975-11-18 Dynapol Corp Food containing non-toxic food coloring compositions and a process therefor
US4096134A (en) * 1975-12-08 1978-06-20 Dynapol Ethylsulfonate-alkylamine copolymers as colorant backbones

Also Published As

Publication number Publication date
US4298595A (en) 1981-11-03
MC1302A1 (fr) 1980-10-03
AT366068B (de) 1982-03-10
IL58969A (en) 1983-05-15
CA1130281A (en) 1982-08-24
ES8101630A1 (es) 1980-12-16
EP0013000A3 (en) 1981-01-21
DK541879A (da) 1980-06-21
GR68718B (es) 1982-02-04
IT1162426B (it) 1987-04-01
IT7951122A0 (it) 1979-12-18
EP0013000B1 (en) 1984-02-29
ATA802479A (de) 1981-07-15
AU5399579A (en) 1980-07-10
IL58969A0 (en) 1980-03-31
PT70615A (en) 1980-01-01
DE2966737D1 (en) 1984-04-05
NZ192458A (en) 1984-07-06
FI793991A (fi) 1980-06-21
NO794171L (no) 1980-06-23
EP0013000A2 (en) 1980-07-09
AU535100B2 (en) 1984-03-01

Similar Documents

Publication Publication Date Title
ES487081A0 (es) Un procedimiento para la preparacion de derivados polimeros del acido 5-aminosalicilico.
ES489887A0 (es) Un procedimiento para preparar derivados del acido 4-amino-3-quimoleincarboxilico.
MX5877E (es) Procedimiento para la preparacion de derivados del acido piridiloxifenoxi-alfa-propionico
ES499856A0 (es) Un procedimiento para la preparacion de derivados del acido 7-oxo-1-azabiciclo (3-2-0) hept-2-en-2-carboxilico
ES521337A0 (es) Un procedimiento para la preparacion de derivados del acido fenoxialquilcarboxilico.
ES500253A0 (es) Un procedimiento para la preparacion de nuevos derivados del acido 2-penem-3-carboxilico.
ES521430A0 (es) Un procedimiento para la preparacion de derivados del acido tetrahidrofurancarboxilico.
AR223663A1 (es) Procedimiento para la preparacion de derivados 1,6-disustituidos de acido 4-piridon-3-carboxilico
ES502828A0 (es) Un procedimiento para la preparacion de derivados del acido penen-3-carboxilico.
ES481233A0 (es) Un procedimiento para la preparacion de derivados del acido 4,5-dihidro-4-oxofuran-2-carboxilico
ES488142A0 (es) Un procedimiento para la preparacion de acido 7-metoxi-5-oxo-5h-tiazolo (2,3-b)quinazolin-2-carboxilico
ES500032A0 (es) Un procedimiento para la preparacion de derivados del acido 7-oxo-1-azabiciclo (3,2,0) hept-2-en-2-carboxilico.
ES489186A0 (es) Un procedimiento para la preparacion de derivados del acido penicilamico 6-b-sustituidos.
AR214306A1 (es) Un procedimiento para la preparacion de 9-tiodericados del acido clavulanico
ES480265A0 (es) Un procedimiento para la preparacion de derivados del acido 7-oxo-1-aza-biciclo (3,2,0) hept-2-en-2-carboxilico
ES500938A0 (es) Un procedimiento para la preparacion de nuevos derivados del acido acetico.
ES486465A0 (es) Un procedimiento para la preparacion de derivados del acido oxisustituido-ciclohexilacetico
ES510658A0 (es) Un procedimiento para la preparacion de un ester clorometilico del acido penicilanico.
AR208533A1 (es) Un procedimiento para la preparacion de derivados de acido 2-aluqil-2 o 3-cefem-4-carboxilico
ES504287A0 (es) Un procedimiento para la preparacion de derivados del acido monico.
ES488136A0 (es) Un procedimiento para la preparacion de derivados del acido monico
ES506798A0 (es) Un procedimiento para la preparacion de derivados del acido amino ciclopropilcarboxilico.
ES508346A0 (es) Un procedimiento para la preparacion de derivados del acido 2 beta-clorometil-2 alfa-metilpenam-3 alfa-carboxilico.
AR222669A1 (es) Procedimiento para la obtencion del acido 3,3-dimetil-2-oxobutirico
ES525238A0 (es) Un procedimiento para la preparacion de derivados del acido penicilanico 6alfa-o-6beta-sustituidos.