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Diterpenoids from Isodon Eriocalyx
Author(s) -
Chen NengYu,
Tian MinQing,
Wu Rui,
Sun HanDong,
Li ChaoMing,
Lin ZhongWen
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000048
Subject(s) - chemistry , stereochemistry , terpene , diterpene , epoxy , organic chemistry
Two new diterpenoids, Maoecrystal U and epi ‐maoecrystal P , together with nine known diterpenoids and eight other known compounds were isolated from Isodon eriocalyx ( ). The structures of two new diterpenoids were elucidated as 6β‐acetoxy‐15β‐hydroxy‐3α,20‐epoxy‐ ent ‐kaur‐16‐ene‐1,7‐dione and 16(S)‐methoxymethy‐6β,7β‐dihydroxy‐7α,20‐epoxy‐ ent ‐kaur‐2,3‐ethenylene‐1,15‐dione on the basis of spectroscopic evidence, especially by 2D NMR techniques.