ABSTRACT
AIM To study the chemical constituents from Pogonatherum crinitum (Thunb.) Kunthand and their in vitro anti-HBV activities.METHODS The ethyl acetate and n-butanol fractions of 70％ ethanol extract from P.crinitum were isolated and purified by AB-8 macroporous resin,silica column and Sephadex LH-20,then the structures of obtained compounds were identified by physicochemical properties and spectral data.The in vitro anti-HBV activities of the isolated compounds were tested in the model of HepG2.2.15 cells.RESULTS Eight compounds were isolated and identified as 6,8,4'-trihydroxy-7,3'-dimethoxyisoflavone (1),quercetin-7,4'-dimethylester-5-O-β-D-glucopyranoside (2),8-(1-(3,4-dihydroxyphenyl) ethyl) quercetin (3),chrysoeiml-7-O-α-L-rhamnopyranosyl-(1 → 2)-β-D-glucopyranoside (4),kaempferol-3-O-(2",3"-di-O-E-p-cou-maroyl)-α-L-rhamnopyranoside (5),1,3,7-trihydroxyxanthone-2-C-β-D-glucopyra-noside (6),luteolin-6-C-β-D-boivinopyranoside (7),luteolin-6-C-β-D-glucopyranoside (8).Compounds 3,5,7,8 had certain inhibitory effects on HBsAg with the IC50 values of 96.6,127.1,72.4 and 54.5 μg/mL.Compounds 7,8 had certain inhibitory effects on HBeAg with the IC50 values of 81.0,61.3 μg/mL.CONCLUSION Compounds 1-6 are isolated from genus Pogonatherum for the first time,compounds 3、5、7、8 have certain in vitro anti-HBV activities.
ABSTRACT
The study on the buds of Jasminum officinale L. var. grandiflorum was carried out to look for anti-HBV constituents. The isolation and purification were performed by HPLC and chromatography on silica gel, polyamide and Sephadex LH-20 column. The structures were elucidated on the basis of physicochemical properties and spectral analysis. Six iridoid glycosides were identified as jasgranoside B (1), 6-O-methy-catalpol (2), deacetyl asperulosidic acid (3), aucubin (4), 8-dehydroxy shanzhiside (5), and loganin (6). Jasgranoside B (1) is a new compound. Compounds 2-6 were isolated from Jasminum officinale L. var. grandiflorum for the first time.
Subject(s)
Humans , Antiviral Agents , Chemistry , Pharmacology , Flowers , Chemistry , Glucosides , Chemistry , Pharmacology , Hep G2 Cells , Hepatitis B Surface Antigens , Metabolism , Hepatitis B virus , Allergy and Immunology , Inhibitory Concentration 50 , Iridoid Glucosides , Chemistry , Iridoid Glycosides , Chemistry , Pharmacology , Iridoids , Chemistry , Jasminum , Chemistry , Molecular Structure , Plants, Medicinal , ChemistryABSTRACT
To study the chemical constituents of the flowers of Jasminum officinale L. var. grandiflorum, the compounds were isolated and purified by HPLC, recrystallization and chromatography on silica gel and Sephadex LH-20 column. Their structures were elucidated on the basis of physicochemical properties and spectral analysis. Six secoiridoids were identified as jasgranoside (I), jaspolyoside (II), 8-epi-kingiside (III), 10-hydroxy-oleuropein (IV), 10-hydroxy-ligstroside (V), oleoside-7, 11-dimethyl ester (VI). Compound I is a new compound. Compounds II, III, IV, V and VI were isolated from Jasminum officinale L. var. grandiflorum for the first time.