Abstract
Two major neutral glyceroglucolipids (A and B) have been isolated from lipid extract of human gastric content by the procedure involving column fractionation on DEAE-Sephadex, silicic acid, and thin-layer chromatography. Both glycolipids contained glucose, glyceryl ethers, and fatty acids. The structures of these glycolipids were identified by mild alkaline methanolysis, oxidation with periodate and chromium trioxide, and permethylation studies. Based on the obtained data, we propose that glycolipid A is a monoalkylmonoacylglyceryl hexaglucoside and glycolipid B is a monoalkylmonoacylglyceryl octaglucoside. The diglyceride portion of these glycolipids consists mostly of 1-O-alkyl-2-O-acylglycerol.
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