[Ligans from branch of Hypericum petiolulatum].
Клучни зборови
Апстракт
OBJECTIVE
To investigate the chemical constituents of Hypericum petiolulatum.
METHODS
The chemical constituents were isolated and purified by column chromatography on silica gel, macroporous adsorbent resin, Sephadex LH-20, and preparative HPLC. Structures of the compounds were identified by NMR and MS spectroscopic methods.
RESULTS
Nine lignans were obtained and their structures were elucidated as (-)-(2R, 3R)-1-O-feruloyl-8,8'-bisdihydrosiringenin (1), (-) -secoisolariciresinol 4-O-beta-D-glucopyrano-side (2), isolariciresinol-beta-4'-O-beta-D-glucopyranoside (3), 5-methoxy-9beta-xylopyra-nosyl-(+) -isolariciresinol (4), (+) -lyoniresinol 2alpha-O-beta-D-xylopyranoside (5), 5-methoxy-9-beta-xylopyranosyl-(-) -isolariciresinol (6), isolariciresinol 6a-O-beta-D-gluco-side (7), (+)-lyoniresinol 3alpha-O-beta-D-xylopyranoside (8) and 7-methoxy-5-benzofuranpropanol 4'-O-beta-D-glucopyranoside (9).
CONCLUSIONS
Coupound 1 was new and compounds 2-9 were obtained from the genus Hypericum for the first time.
