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Oxygenated 4‐Methylidene Sterols from the South China Sea Sponge Theonella swinhoei
Author(s) -
Zhang HongJun,
Yi YangHua,
Lin HouWen
Publication year - 2010
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.200900312
Subject(s) - sponge , chemistry , sterol , stereochemistry , aldehyde , organic chemistry , biochemistry , botany , cholesterol , biology , catalysis
Abstract Two new O‐bearing 4‐methylidene sterols, 9 α ‐hydroxy‐15‐oxoconicasterol ( 1 ) and 8 β ‐hydroxy‐B‐norconicasta‐6 α ‐aldehyde ( 2 ), were isolated from the EtOH extract of the marine sponge Theonella swinhoei collected from the South China Sea. Their structures were elucidated by spectroscopic data and comparison with known compounds. In addition, spectroscopic data reported for the known 4‐methylidene sterol 7 α ‐hydroxyconicasterol ( 3 ) were revised.