Summary of the invention
The present invention is separation and purification 7 pairs of naphthoquinones enantiomters from radix macrotomiae and gromwell root respectively: AK (1), CAN1 (2), β-acetoxyl group isovaleryl AK (3), deoxidation AK (4), isobutyryl AK (5), β, beta-dimethyl-acry-lalkannin (6), isovaleryl AK (7), Alpha-Methyl-positive butyryl AK (8), alkannin (10), beta-hydroxyisovalerylshiderivative (11), Acetylshikonin (12), deoxyshikonin (4), isobutyryl shikonin (14), β, beta-dimethyl-acryloyl alkannin (15), IVS (16), Alpha-Methyl-positive butyryl alkannin (17).Determine their circular dichroism spectra (CD) respectively, find that they all have following feature: the CD collection of illustrative plates (partial spectrum is shown in Fig. 1-7) of the alkannin naphthoquinone analogs in radix macrotomiae is at 210-240nm, 250-300nm, 325-400nm and 450-600nm provides negative Cotton effect respectively, at 200-210nm, 240-250nm, 300-325nm, 400-450nm provide positive Cotton effect respectively; The CD collection of illustrative plates of the alkannin class naphthoquinone analogs in gromwell root is at 210-240nm, 250-300nm, 325-400nm and 450-600nm provides positive Cotton effect respectively, at 200-210nm, 240-250nm, 300-325nm, 400-450nm provide negative Cotton effect respectively, and the CD absorption curve of both compositions is just the opposite.
We find, if utilize the liquid chromatography technologies such as HPLC, compartment analysis goes out the naphthaquinone derivatives in Asian puccoon, recycle the circular dichroism that circular dichroism spectra (CD) detects them, just can distinguish and identify radix macrotomiae and gromwell root medicinal material well, especially radix macrotomiae and gromwell root extract (comprising the herbal mixture containing Asian puccoon, naphthoquinones constituents monomer).
For this reason, we study and have found that good separation analyzes liquid phase-circular dichroism spectra (LC-CD) condition of the naphthaquinone derivatives in Asian puccoon, find the wavelength coverage (210-240nm detecting circular dichroism spectra (CD) several the best of radix macrotomiae and gromwell root, 250-300nm, 325-400nm and 450-600nm, 200-210nm, 240-250nm, 300-325nm, 400-450nm) and optimal wavelength (220nm, 245nm, 260nm, 310nm, 360nm, 430nm and 550nm).Thus, provide the method that radix macrotomiae and gromwell root medicinal material and extract (comprising the herbal mixture containing Asian puccoon, naphthoquinones constituents monomer) were identified and distinguished to one exactly.
The present invention relates to the authentication method utilizing liquid phase-circular dichroism spectra (LC-CD) technology to distinguish radix macrotomiae and gromwell root, to identifying radix macrotomiae and gromwell root exactly.To avoid the confusion be all difficult to from aspects such as the ratios of mode of appearance and contained naphthoquinones constituents due to radix macrotomiae and gromwell root the market circulation differentiating to cause and process of clinical application, ensure the efficacy and saferry of clinical middle Asian puccoon.
The present invention establishes the analytical approach utilizing liquid phase-circular dichroism spectra (LC-CD) technology to distinguish radix macrotomiae and the qualification of gromwell root: with HPLC for the liquid phase analysis of representative is separated the naphthoquinones constituents contained by Asian puccoon, with circular dichroism spectra (CD) for detecting, in conjunction with UV detect, analyze radix macrotomiae and gromwell root medicinal material and extract and (comprise the herbal mixture containing Asian puccoon, naphthoquinones constituents monomer), analyze the chromatogram obtained, consistent with standard medicinal material, or it is consistent with the radix macrotomiae that the present invention sets up and gromwell root liquid phase-circular dichroism spectra (LC-CD) feature separately, all can differentiate exactly.
The configuration of reference substance solution: get naphthoquinones constituents reference substance precision and take in right amount, be mixed with appropriate reference substance solution with methyl alcohol.
The collocation method 1 of sample solution: precision takes radix macrotomiae or gromwell root sample (medicinal material, extract, chemical composition monomer, herbal mixture etc. containing Asian puccoon) in right amount each, with methyl alcohol (or chloroform, ethyl acetate, acetone, acetonitrile, sherwood oil, the aqueous solution of the organic solvents such as cyclohexane and variable concentrations thereof) extract, reclaim extract, methyl alcohol (or chloroform, ethyl acetate, acetone, acetonitrile, sherwood oil, the aqueous solution of the organic solvents such as cyclohexane and variable concentrations thereof) dissolve, through the little chromatographic column pre-service of SPE of filling ODS (dodecyl bonded silica gel), the removal of impurities of water (or low-concentration organic solvent) wash-out, the use that continues acetonitrile (or methyl alcohol, ethyl acetate, acetone, chloroform, sherwood oil, the aqueous solution of the organic solvents such as cyclohexane and variable concentrations thereof) washing, merge eluent, methyl alcohol dissolves, constant volume, filter, obtain.
The collocation method 2 of sample solution: it is in right amount each that precision takes radix macrotomiae or gromwell root sample (medicinal material, extract, chemical composition monomer, herbal mixture etc.) containing Asian puccoon, extract with methyl alcohol (or aqueous solution of the organic solvent such as chloroform, ethyl acetate, acetone, acetonitrile, sherwood oil, cyclohexane and variable concentrations thereof), reclaim extract, methyl alcohol dissolves, constant volume, filter, to obtain final product.
The collocation method 3 of sample solution: it is in right amount each that precision takes radix macrotomiae or gromwell root sample (medicinal material, extract, chemical composition monomer, herbal mixture etc.) containing Asian puccoon, extract with methyl alcohol (or aqueous solution of the organic solvent such as chloroform, ethyl acetate, acetone, acetonitrile, sherwood oil, cyclohexane and variable concentrations thereof), filter, to obtain final product.
Method of testing: carry out HPLC analysis, with circular dichroism spectra (CD) for detecting, detects in conjunction with ultraviolet (UV), record chromatogram.Because naphthoquinones constituents has absorption peak at 200-300nm or 400-600nm in ultraviolet spectrum, can measure within the scope of these two; And in circular dichroism spectra, the cotton effect difference within the scope of 200-600nm (see Fig. 8,9) of each enantiomter, can in 200-600nm scope, selected wavelength measures (210-240nm, 250-300nm, 325-400nm and 450-600nm arbitrarily, 200-210nm, 240-250nm, 300-325nm, 400-450nm).
The present invention considers the factor such as convenience and sensitivity of Simultaneously test, best mensuration wavelength chooses is 220nm, 245nm, 260nm, 310nm, 360nm, 430nm and 550nm, wherein, 320nm, 360nm two wavelength place uv absorption are more weak, and 430nm wavelength place circular dichroism spectra is more weak, is not too beneficial to Simultaneously test ultraviolet spectrum and circular dichroism spectra.Therefore, optimum is 220nm, 245nm, 260nm and 550nm.
After mensuration, liquid phase-ultraviolet (LC-UV) chromatogram that radix macrotomiae and each wavelength place of gromwell root sample measure is posivtive spike.
Radix macrotomiae is different with the symbol of chromatographic peak in liquid phase-circular dichroism spectra (LC-CD) chromatogram that gromwell root sample each wavelength place measures, and specific features is as follows:
Liquid phase-circular dichroism spectra (LC-CD) chromatogram measured at 220nm, 260nm, 360nm and 550nm place
In radix macrotomiae, each chromatographic peak is negative peak, and in gromwell root, each chromatographic peak is posivtive spike.
Liquid phase-circular dichroism spectra (LC-CD) chromatogram measured at 245nm, 310nm and 430nm place
In radix macrotomiae, each chromatographic peak is posivtive spike, and in gromwell root, each chromatographic peak is negative peak.
1) with the LC-UV chromatographic peak area of compound each in sample, compared with chromatographic peak area corresponding to standard control sample, according to calibration curve method (or external standard 1 method, external standard 2 methods etc.), carry out quantitative test, calculate, obtain the total content of two enantiomters of each naphthoquinones constituents in sample.
2) positive and negative with the LC-UV chromatographic peak area of compound each in sample and chromatographic peak, chromatographic peak area corresponding to standard control sample is compared with the positive and negative of chromatographic peak, according to calibration curve method (or external standard 1 method, external standard 2 methods etc.), carry out quantitative test, calculate, obtain the ratio of two enantiomters of each naphthoquinones constituents in sample.
Also can according to the chromatographic peak in above-mentioned method of testing positive and negative rule, qualification radix macrotomiae and gromwell root.(Figure 10,11 is respectively radix macrotomiae and gromwell root liquid phase-ultraviolet chromatogram (LC-UV) figure and liquid phase-circular dichroism spectra (LC-CD) figure of 274nm place mensuration).From in figure: can very clearly distinguish radix macrotomiae and gromwell root according to liquid phase-circular dichroism spectra (LC-CD) figure.
The present invention also to comprise in radix macrotomiae and gromwell root the separation and purification method of 7 pairs of naphthoquinones enantiomters:
1) AK (1) in radix macrotomiae, CAN1 (2), β-acetoxyl group isovaleryl AK (3), deoxyshikonin (4), isobutyryl AK (5), β, the preparation method of beta-dimethyl-acry-lalkannin (6), isovaleryl AK (7), Alpha-Methyl-positive butyryl AK (8) is as follows:
Find that the naphthoquinones constituents polarity in Asian puccoon is less according to our research, be soluble in the organic solvent such as ethanol, sherwood oil, especially find that this constituents is to light, thermally labile, so screening is determined to extract Gronwell naphthaquinone composition with 95% ethanol cold soaking.
Radix macrotomiae medicinal extract, through thin-layer chromatographic analysis and silica gel column chromatography test, finds with sherwood oil: ethyl acetate carries out column chromatography gradient elution, can be separated Gronwell naphthaquinone composition preferably.The separation method of each compound is as follows:
The forward part of sherwood oil wash-out merges stream part, carries out silica gel column chromatography, sherwood oil: ethyl acetate gradient (100: 1), can obtain isovaleryl AK (7) and Alpha-Methyl-positive butyryl AK (8);
The rear section of sherwood oil wash-out merges stream part, carries out silica gel column chromatography, sherwood oil: ethyl acetate gradient (100: 0.5), can obtain deoxidation AK (4) and β, beta-dimethyl-acry-lalkannin (6);
Sherwood oil: the forward part of ethyl acetate (100: 0.5) wash-out merges stream part, carry out silica gel column chromatography, sherwood oil: ethyl acetate gradient, 100: 0.5, CAN1 (2) and β can be obtained, beta-dimethyl-acry-lalkannin (6);
Sherwood oil: the rear section of ethyl acetate (100: 0.5) wash-out merges stream part, carry out silica gel column chromatography, sherwood oil: ethyl acetate gradient, collect 100: 2 stream parts, utilize preparation liquid phase (ODS, methanol-water (65: 35) wash-out), separablely obtain isobutyryl AK (5);
Sherwood oil: part is flowed in the merging of ethyl acetate (100: 1) wash-out, carries out silica gel column chromatography, sherwood oil: ethyl acetate gradient, collect stream part of 100: 2, silica gel column chromatography repeatedly, can obtain AK (1);
Sherwood oil: part is flowed in the merging of ethyl acetate (100: 2) wash-out is eluent with methanol-water, utilizes ODS to carry out separation and purification, methanol-water (60: 40) wash-out, can obtain β-acetoxyl group isovaleryl AK (3).
2) because be only enantiomter, so its physicochemical property is consistent with chromatographic behavior in the naphthoquinones constituents in gromwell root and radix macrotomiae.Therefore, alkannin (10) in gromwell root, beta-hydroxyisovalerylshiderivative (11), Acetylshikonin (12), deoxyshikonin (4), isobutyryl shikonin (14), β, the preparation method of beta-dimethyl-acryloyl alkannin (15), IVS (16), Alpha-Methyl-positive butyryl alkannin (17) is consistent with the preparation method of its enantiomter in radix macrotomiae, and concrete grammar is as follows:
Gronwell naphthaquinone composition is extracted with 95% ethanol cold soaking.
Gromwell root medicinal extract, through thin-layer chromatographic analysis and silica gel column chromatography test, finds with sherwood oil: ethyl acetate carries out column chromatography gradient elution, can be separated Gronwell naphthaquinone composition preferably.The separation method of each compound is as follows:
Sherwood oil: ethyl acetate (100: 0.5) wash-out, part is shunted in the front portion merging sherwood oil wash-out, carry out silica gel column chromatography, sherwood oil: ethyl acetate gradient, sherwood oil: ethyl acetate (100: 0.5) wash-out obtains deoxyshikonin (4)
Sherwood oil: ethyl acetate (100: 0.5) wash-out, part is shunted at the middle part merging sherwood oil wash-out, carry out silica gel column chromatography, sherwood oil: ethyl acetate gradient, sherwood oil: ethyl acetate (100: 0.5) obtains IVS (16) and Alpha-Methyl-positive butyryl alkannin (17);
Sherwood oil: ethyl acetate (100: 0.5) wash-out, part is shunted at the rear portion merging sherwood oil wash-out, carry out silica gel column chromatography, sherwood oil: ethyl acetate gradient, sherwood oil: ethyl acetate (100: 0.5) stream part, utilize preparation liquid phase separation, at acetonitrile: water (75: 25) obtains isobutyryl shikonin (14) and β, beta-dimethyl-acryloyl alkannin (15);
Sherwood oil: ethyl acetate (100: 1) wash-out, merge stream part, recrystallization obtains Acetylshikonin (12);
Sherwood oil: ethyl acetate (100: 7) wash-out, merges stream part, dextran gel column chromatography, methanol-eluted fractions, collects red stream part, obtains alkannin (10) by preparation liquid phase separation;
Sherwood oil: ethyl acetate (100: 15) wash-out, merges stream part, ODS purification by column chromatography, methanol-water gradient elution, and Fractional Collections redness stream part, obtains beta-hydroxyisovalerylshiderivative (11) by preparation liquid phase separation.