학술논문

2,2-Dialkylacetic Acids -A New Class of Naturally Occurring Lipid Constituents
Document Type
research-article
Source
Zeitschrift für Naturforschung C. 50(1-2):123-126
Subject
Dialkyl Fatty Acids
Uropygial Gland Secretion
Birds
Seriemas
Language
English
ISSN
1865-7125
0939-5075
Abstract
The uropygial gland waxes of the South American red-legged Seriema (Cariama cristata (L., 1766)) were found to be composed of unbranched alcohols and 2,2′-dialkyl-substituted acetic acids which so far have not been found in skin lipids. When used as a chemosystematic character, the occurrence of this lipid class separates the order Cariamiformes (Seriemas) from all other avian orders hitherto investigated, especially from the Gruiformes (cranes and rails) to which they have been tentatively attributed in the past. From the GC retention time data now available for a series of 2-alkyl-substituted fatty acid methyl esters relative retention time indices for other compounds may be predicted.