Abstract
Five glycerol derivatives (1—5) and three sterols (6—8) were isolated from the EtOH extraction of the brown alga of Sargassum parvivesiculosum. On the basis of spectroscopic methods, their structures were elucidated as 1,3-di-O-[2′,2′-di-(p-phenylene) isopropylidene] glycerol (1), (2S)-1-O-heptatriacontanoyl glycerol (2), (2S)-1,2-di-O-palmitoyl-3-O-(6-sulpho-α-D-quinovopyranosyl) glycerol (3), (2S)-1-O-palmitoyl glycerol (4), (2S)-1,3-di-(O-palmitoyl)-2-O-octadecanoyl glycerol (5), 24-ethylcholest-5,23Z-dien-3β,28ζ-diol (6), 24-vinylcholest-5-en-24ζ-hydroperoxy (7), 24-ethylcholest-4,24(28)-dien-3β-ol (8), respectively. Among them, 1 and 2 were new.
