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New Lignans from the Aerial Parts of Rudbeckia laciniata
Author(s) -
Lee Seung Young,
Woo Kyeong Wan,
Kim Chung Sub,
Lee Dong Ung,
Lee Kang Ro
Publication year - 2013
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.201200177
Subject(s) - chemistry , alkaline hydrolysis , lignan , hydrolysis , stereochemistry , organic chemistry
Three new furofuran lignans, (+)‐4,4′‐ O ‐diangeloylpinoresinol ( 1 ), (+)‐4,4′‐ O ‐diangeloylmedioresinol ( 2 ), and (+)‐4,4′‐ O ‐diangeloylsyringaresinol ( 3 ), together with the known compound (+)‐syringaresinol, were isolated from the MeOH extract of Rudbeckia laciniata. The structure elucidation of these compounds were based on 1D‐ and 2D‐NMR, and HR‐ESI‐MS data. The additional structural evidence was obtained from alkaline hydrolysis of the compounds.