Two new oleanane triterpene saponins, named as anhuienside C (1) and D (2), were isolated from the rhizomes of Anemone anhuiensis (Ranunculaceae). The structures of the new compounds were elucidated as 3-O-alpha-L-rha...Two new oleanane triterpene saponins, named as anhuienside C (1) and D (2), were isolated from the rhizomes of Anemone anhuiensis (Ranunculaceae). The structures of the new compounds were elucidated as 3-O-alpha-L-rhamnopyranosyl (1-->2)-beta-D-xylopyranosyl oleanolic acid 28-O-beta-D-glucopyranosyl (1-->6)-beta-D-glucopyranosyl ester (1) and 3-O-beta-D-xylopyranosyl oleanolic acid 28-O-alpha-L-rhamnopyranosyl (1-->4)-beta-D-glucopyranosyl (1-->6)-beta-D-glucopyranosyl ester (2), respectively.展开更多
Two new compounds have been isolated from methanol extract of roots of Pulsatilla chinensis(Bunge) Hegel. Their structures were established as 3-oxo-23-hydroxy-lup-20(29)-en-28-oic acid (Ⅱ) and 3-0--L-arabinopyranosy...Two new compounds have been isolated from methanol extract of roots of Pulsatilla chinensis(Bunge) Hegel. Their structures were established as 3-oxo-23-hydroxy-lup-20(29)-en-28-oic acid (Ⅱ) and 3-0--L-arabinopyranosyl-3β, 23-dihydroxylup-20(29)-en-28-oic acid (Ⅲ).展开更多
A series of natural product 23-hydroxybetulinic acid derivatives were prepared. In the preparation of mono-O-benzoyl ester derivative, it was observed that benzoyl group migrated from 3-0- to 23-O-position during the ...A series of natural product 23-hydroxybetulinic acid derivatives were prepared. In the preparation of mono-O-benzoyl ester derivative, it was observed that benzoyl group migrated from 3-0- to 23-O-position during the detritylation.展开更多
文摘Two new oleanane triterpene saponins, named as anhuienside C (1) and D (2), were isolated from the rhizomes of Anemone anhuiensis (Ranunculaceae). The structures of the new compounds were elucidated as 3-O-alpha-L-rhamnopyranosyl (1-->2)-beta-D-xylopyranosyl oleanolic acid 28-O-beta-D-glucopyranosyl (1-->6)-beta-D-glucopyranosyl ester (1) and 3-O-beta-D-xylopyranosyl oleanolic acid 28-O-alpha-L-rhamnopyranosyl (1-->4)-beta-D-glucopyranosyl (1-->6)-beta-D-glucopyranosyl ester (2), respectively.
文摘Two new compounds have been isolated from methanol extract of roots of Pulsatilla chinensis(Bunge) Hegel. Their structures were established as 3-oxo-23-hydroxy-lup-20(29)-en-28-oic acid (Ⅱ) and 3-0--L-arabinopyranosyl-3β, 23-dihydroxylup-20(29)-en-28-oic acid (Ⅲ).
基金supported by the National Natural Science Foundation of the People's Republic of China(No.30472083).
文摘A series of natural product 23-hydroxybetulinic acid derivatives were prepared. In the preparation of mono-O-benzoyl ester derivative, it was observed that benzoyl group migrated from 3-0- to 23-O-position during the detritylation.
