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New Eremophilane Sesquiterpenes from Ligularia japonica
Author(s) -
Xu JiQing,
Hu LiHong
Publication year - 2009
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.200800340
Subject(s) - chemistry , sesquiterpene , stereochemistry , cryptomeria , japonica , botany , biology
Four new eremophilane‐type sesquiterpenes, 3 β ‐(acetyloxy)‐6 β ‐(2‐methylbutanoyloxy)‐10 β ‐hydroxyeremophil‐7(11)‐en‐12,8 α ‐olide ( 1 ), 3 β ‐(acetyloxy)‐6 α ,7 α ‐epoxy‐11‐noreremophil‐9(10)‐ene‐8,11‐dione ( 2 ), 3 β ‐hydroxy‐11‐noreremophila‐6(7),9(10)‐diene‐8,11‐dione ( 3 ), and 3 β ‐(3‐methylbutanoyloxy)‐11‐noroxoeremophila‐6(7),9(10)‐diene‐8,11‐dione ( 4 ) were isolated from roots of Ligularia japonica. The structures of the new compounds were elucidated through spectral studies including HR‐EI‐MS, IR, and NMR data.