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2005:
He Dong-Hui; Matsunami Katsuyoshi; Otsuka Hideaki; Shinzato Takakazu; Aramoto Mitsunori; Bando Masahiko; Takeda Yoshio
Tricalysiosides H-O: Ent-kaurane glucosides from the leaves of Tricalysia dubia.
Phytochemistry 2005;
66(
24):.
Eight ent-kaurane glucosides, named tricalysiosides H-O, were isolated from Tricalysia dubia. Tricalysioside H possessed a hydroxyl group at the 1-position, to which the glucose moiety was attached. The structure was first elucidated by means of spectroscopic data analysis and finally confirmed by X-ray crystallography. Since acid hydrolysis of 1 gave D-glucose, the aglycone was proved to have an enantio-kaurane type skeleton. The structures of tricalysiosides I-O were mainly elucidated from analysis of spectroscopic evidence.
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