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Three New Highly Oxygenated Diterpenoids from Excoecaria cochinchinensis L our .
Author(s) -
Yang JingHua,
Luo ShiDe,
Zhao JingFeng,
Wang Yunsong,
Huang Rong,
Zhang HongBin,
Li Liang
Publication year - 2005
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200590090
Subject(s) - chemistry , epoxy , stereochemistry , organic chemistry
Chemical examination of the AcOEt extract of the leaves and twigs of Excoecaria cochinchinensis L our . collected from Xishuangbanna resulted in the isolation of the three new highly oxygenated diterpenoids 1 – 3 . The structures of the new diterpenoids were elucidated by a study of their physical and spectra data as (2 β ,3 β ,5 α ,6 α )‐2,3‐bis(acetyloxy)‐8,13‐epoxy‐6,9‐dihydroxylabd‐14‐en‐11‐one (=excolabdone A; 1 ), (1 α ,5 α ,6 β ,7 β )‐1,6‐bis(acetyloxy)‐8,13‐epoxy‐7,9‐dihydroxylabd‐14‐en‐11‐one (=excolabdone B; 2 ), and (1 α ,5 α ,6 β ,7 β )‐6‐(acetyloxy)‐8,13‐epoxy‐1,7,9‐trihydroxylabd‐14‐en‐11‐one (=excolabdone C; 3 ).