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Malonylated Glycerolipids from the Glandular Trichome Exudate of Ceratotheca triloba
Author(s) -
Ohkawa Akiko,
Sakai Takaomi,
Ohyama Kiyoshi,
Fujimoto Yoshinori
Publication year - 2012
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201200097
Subject(s) - exudate , chemistry , moiety , trichome , stereochemistry , botany , biology
Chemical investigation of the glandular trichome exudate from Ceratotheca triloba (Pedaliaceae) led to the identification of nine 1‐ O ‐acetyl‐2‐ O ‐[( R )‐3‐acetyloxy‐fatty acyl]‐3‐ O ‐malonylglycerols. Among these, 1‐ O ‐acetyl‐2‐ O ‐[( R )‐3‐acetyloxyicosanoyl]‐3‐ O ‐malonylglycerol ( 7 ) was the most abundant constituent (41%), followed by 1‐ O ‐acetyl‐2‐ O ‐[( R )‐(3‐acetyloxyoctadecanoyl)‐3‐ O ‐malonylglycerol ( 2 ; 21%). Compounds having iso‐ and anteiso‐type structures in the 3‐acetyloxy‐fatty acyl groups in the fatty acyl moiety were also characterized as minor constituents. This is the first report of the isolation of malonylated glycerolipids as natural products.