Four new labdane-type diterpenoid glycosides,laevissiosides A-D(1-4)were isolated from the 95%ethanol extract of Diplopterygium laevissimum(Christ)Nakai,along with two known analogues,18-b-D-glucopyranosyl ester-sclar...Four new labdane-type diterpenoid glycosides,laevissiosides A-D(1-4)were isolated from the 95%ethanol extract of Diplopterygium laevissimum(Christ)Nakai,along with two known analogues,18-b-D-glucopyranosyl ester-sclareol(5)and 18-hydroxy-sclareol(6).The structures of compounds 1-4 were elucidated by extensive 1D and 2D NMR spectroscopy as well as high-resolution MS analyses.All isolated compounds were evaluated for their cytotoxic effects.展开更多
A new labdane-type diterpene glycoside 1 , chlorophytoside A, had been isolated from Chlorophytum laxum R.Br. The structure had been elucidated as (10S)-6α-hydroxy- labda-8,13-dien-15,16-olide 3R-O-β-D-glucopyranosi...A new labdane-type diterpene glycoside 1 , chlorophytoside A, had been isolated from Chlorophytum laxum R.Br. The structure had been elucidated as (10S)-6α-hydroxy- labda-8,13-dien-15,16-olide 3R-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data.展开更多
基金the National Basic Research Program of China(973 Program Nos.2009CB522303 and 2011CB915503)the National Natural Science Foundation of China(Nos.90813004 and U0932602)+1 种基金the projects from Chinese Academy of sciences(Nos.2009311211011 and 2009312311024)the State Key Laboratory of Phytochemistry and Plant Resources in West China(No.P2010-ZZ05).
文摘Four new labdane-type diterpenoid glycosides,laevissiosides A-D(1-4)were isolated from the 95%ethanol extract of Diplopterygium laevissimum(Christ)Nakai,along with two known analogues,18-b-D-glucopyranosyl ester-sclareol(5)and 18-hydroxy-sclareol(6).The structures of compounds 1-4 were elucidated by extensive 1D and 2D NMR spectroscopy as well as high-resolution MS analyses.All isolated compounds were evaluated for their cytotoxic effects.
文摘A new labdane-type diterpene glycoside 1 , chlorophytoside A, had been isolated from Chlorophytum laxum R.Br. The structure had been elucidated as (10S)-6α-hydroxy- labda-8,13-dien-15,16-olide 3R-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data.
