Five compounds (1 - 5) were isolated from the rhizome of Beesia calthaefolia (Maxim.) Ulbr. Based on chemical and spectral evidence, their structures were determined as beesic acid (9-phenyl-2E, 4E, 6E, 8E-nontetraeno...Five compounds (1 - 5) were isolated from the rhizome of Beesia calthaefolia (Maxim.) Ulbr. Based on chemical and spectral evidence, their structures were determined as beesic acid (9-phenyl-2E, 4E, 6E, 8E-nontetraenoic acid, 1), vanillic acid (2), oleanolic acid-3-O-alpha.-L-arabinopyranosyl-28-O-alpha -L-rhanmopyranosyl-(1 --> 4)-beta -D-glucopyranosyl-(1 --> 6)-beta -D-glucopyranosyl ester (3), hederasaponin B (oleanolic acid-3-O-alpha -L-rhanmopyranosyl-(1-->2)-alpha -L-arabinopyranosyl-28-O-alpha -L-rhamnopyranosyl-(1-->4)beta -D-glucopyranosyl-(1-->6)-beta -D-glucopyranosyl ester, 4) and beesioside Q (oleanolic acid-3-O-beta -D-glucopyranosyl-(1-->3)-alpha -L-rhamnopyranosyl-(1-->2)-alpha -L-arabinopyranosyl-28-O-alpha -L-rhamnopyranosyl-(1--> 4)-beta -D-glucopyranosyl-(1-->6)-beta -D-glucopyranosyl ester, 5), respectively. Compound 1 was isolated from natural sources for the first time and compound 5 was a new compound.展开更多
A new oleanane-type triterpene was isolated from the roots of Doellingeria scaber. Its structure was identified as 3-oxo-16a-hydroxy-olean-12-en-28-oic acid based on 1D and 2D NMR spectroscopy and X-ray analysis.
Two new oleanane-type saponins,crotalarioside A（1） and crotalarioside B（2）,were isolated from the roots of Polygala crotalarioides.Their structures were elucidated on the basis of spectroscopic and chemical evidence.
A new oleanane-type saponin, named subcapitatoside A, has been isolated from the roots of Aralia subcapitata. On the basis of chemical and spectral evidence: the structure of subcapitatoside A has been established as:...A new oleanane-type saponin, named subcapitatoside A, has been isolated from the roots of Aralia subcapitata. On the basis of chemical and spectral evidence: the structure of subcapitatoside A has been established as: 3-O-beta-D-galactopyranosyl-(1-->2)-beta-D-galactopyranosyl oleanolic acid.展开更多
文摘Five compounds (1 - 5) were isolated from the rhizome of Beesia calthaefolia (Maxim.) Ulbr. Based on chemical and spectral evidence, their structures were determined as beesic acid (9-phenyl-2E, 4E, 6E, 8E-nontetraenoic acid, 1), vanillic acid (2), oleanolic acid-3-O-alpha.-L-arabinopyranosyl-28-O-alpha -L-rhanmopyranosyl-(1 --> 4)-beta -D-glucopyranosyl-(1 --> 6)-beta -D-glucopyranosyl ester (3), hederasaponin B (oleanolic acid-3-O-alpha -L-rhanmopyranosyl-(1-->2)-alpha -L-arabinopyranosyl-28-O-alpha -L-rhamnopyranosyl-(1-->4)beta -D-glucopyranosyl-(1-->6)-beta -D-glucopyranosyl ester, 4) and beesioside Q (oleanolic acid-3-O-beta -D-glucopyranosyl-(1-->3)-alpha -L-rhamnopyranosyl-(1-->2)-alpha -L-arabinopyranosyl-28-O-alpha -L-rhamnopyranosyl-(1--> 4)-beta -D-glucopyranosyl-(1-->6)-beta -D-glucopyranosyl ester, 5), respectively. Compound 1 was isolated from natural sources for the first time and compound 5 was a new compound.
文摘A new oleanane-type triterpene was isolated from the roots of Doellingeria scaber. Its structure was identified as 3-oxo-16a-hydroxy-olean-12-en-28-oic acid based on 1D and 2D NMR spectroscopy and X-ray analysis.
文摘Two new oleanane-type saponins,crotalarioside A（1） and crotalarioside B（2）,were isolated from the roots of Polygala crotalarioides.Their structures were elucidated on the basis of spectroscopic and chemical evidence.
文摘A new oleanane-type saponin, named subcapitatoside A, has been isolated from the roots of Aralia subcapitata. On the basis of chemical and spectral evidence: the structure of subcapitatoside A has been established as: 3-O-beta-D-galactopyranosyl-(1-->2)-beta-D-galactopyranosyl oleanolic acid.
