A monogalactopyranosyl acylglycerol from Oltmannsiellopsis unicellularis (NIES-359)

Abstract (2S)-1-O- Hexadeca-4″,7″,10″,13″-tetraenoyl -3-O-β- d -galactopyranosyl glycerol, isolated from the marine alga Oltmannsiellopsis unicellularis (NIES-359), inhibited platelet aggregation induced by U46619, a thromboxane A 2 analogue. Its structure was elucidated by spectroscopic analysis and chemical evidence.