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New Lignans from the Roots of Taiwania cryptomerioides Hayata
Author(s) -
Chyu ChiouFung,
Kuo YuehHsiung
Publication year - 2007
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.200790074
Subject(s) - chemistry , chamaecyparis , furan , stereochemistry , lignan , spectral analysis , organic chemistry , botany , physics , quantum mechanics , spectroscopy , biology
The five new lignans designated 3′,4′‐de‐ O ‐methylenehinokinin ( 1 ), taiwaninolide ( 2 ), 8′‐hydroxysavinin ( 3 ), isoguamarol ( 4 ), and 4′‐ O ‐methylsalicifolin ( 5 ), as well as the new 4‐(3,4‐dimethoxybenzyl)dihydro‐3‐(4‐hydroxybenzyl)furan‐2(3 H )‐one ( 6 ) were isolated from the roots of Taiwania cryptomerioides , besides the three known compounds hinokinin ( 8 ), savinin ( 9 ), and 3,4‐de‐ O ‐methylenehinokinin ( 7 ). The structures of the new constituents were elucidated through chemical and spectral studies. A compound previously isolated from the heartwood of Chamaecyparis obtusa var. formosana was assigned structure 1 ; however, this structure has now been revised to be 3,4‐de‐ O ‐methylenehinokinin ( 7 ).