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A New Dimeric Stilbenoid with a Five‐Membered Lactone Ring from Shorea hemsleyana
Author(s) -
Ito Tetsuro,
Tanaka Toshiyuki,
Iinuma Munekazu,
Nakaya Kenichi,
Takahasi Yoshikazu,
Nakamura Hikaru,
Naganawa Hiroshi,
Riswan Soedarsono
Publication year - 2003
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.200390283
Subject(s) - chemistry , ring (chemistry) , lactone , absolute configuration , derivative (finance) , stereochemistry , bark (sound) , organic chemistry , financial economics , economics , physics , acoustics
From the stem bark of Shorea hemsleyana , a new dimeric stilbenoid with a five‐membered lactone ring, shorealactone ( 1 ) was isolated. The absolute configuration was determined by means of 2D NMR techniques and X‐ray crystal‐structure analysis of its 4‐bromobenzoyl derivative 1e by means of anomalous scattering of the Br‐atom.