| 摘要 |
NEW MATERIAL:A compound expressed by formula I (R is H or lower alkanoyl; R' is H, lower alkanoyl, group expressed by formula II, etc.; R'' is H, lower alkanoyl or group expressed by formula III). EXAMPLE:2-( 3, 4-Dihydroxyphenyl )ethyl-O-alpha-L-lamnopyranocyl-(1 2)-3-O-cafeoil- beta-D-aropyranoside. USE:An antistress agent, antimicrobial agent and anticancer agent. PREPARATION:For example, Magnoliae Cortex (Magnolia obovata Thunb.) is finely cut and extracted with methanol, etc. and the extracted liquid is concentrated under reduced pressure to give crude extract, which is suspended in water and the suspension is extracted with n-butanol and the extract is subjected to silica gel chromatography and column chromatography and purified to provide the compound expressed by formula I.
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