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Further Biphenyl Lignans with a Tetrahydrofuran Moiety from Gymnotheca chinensis
Author(s) -
Xiao Shiji,
He Dahai,
Fang Dongmei,
Chen Fang,
Ding Lisheng,
Zhou Yan
Publication year - 2014
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.201300208
Subject(s) - chemistry , tetrahydrofuran , moiety , biphenyl , atropisomer , two dimensional nuclear magnetic resonance spectroscopy , nuclear magnetic resonance spectroscopy , stereochemistry , lignan , chemical structure , organic chemistry , solvent
Four new biphenyl lignans, 1 – 4 , with a tetrahydrofuran moiety were isolated from the MeOH extract of the whole plant of Gymnotheca chinensis. Their chemical structures were established by means of spectroscopic analysis, including 1D and 2D NMR spectroscopy and comparison with previously reported data. Compounds 1 – 4 occur as mixtures of atropisomers as revealed by variable‐temperature NMR experiments.