HETEROSIGMA-GLYCOLIPIDS I AND II, TWO NEW GALACTOLIPIDS CONTAINING OCTADECATETRAENOYL AND EICOSAPENTAENOYL RESIDUES, FROM A RAPHIDOPHYTE DINOFLAGELLATE HETEROSIGMA SP.

Isao KITAGAWA; Kozo HAYASHI; Motomasa KOBAYASHI

doi:10.1248/cpb.37.849

Isao KITAGAWA, Kozo HAYASHI, Motomasa KOBAYASHI

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Keywords: heterosigma-glycolipid I, heterosigma-glycolipid II, dinoflagellate raphidophycean, Heterosigma sp., galactolipid, eicosapentaenoic acid, enzymatic hydrolysis, lipase

JOURNAL FREE ACCESS

1989 Volume 37 Issue 3 Pages 849-851

DOI https://doi.org/10.1248/cpb.37.849

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Abstract

A new galactolipid containing an eicosapentaenoyl (EPA) residue, named heterosigma-glycolipid II (2__∼), was isolated from a coltured raphidophycean dinoflagellate Heterosigma sp., together with another new galactolipid heterosigma-glycolipid I (1__∼). Based on enzymatic hydrolysis using lipase and physicoshemical evidence, the structures of heterosigma-glycolipids I (1__∼) and II (2__∼) have been determined as (2'S)-2', 3'-di-O-(6, 9, 12, 15-octadecatetraenoyl)-glyceryl β-D-galactopyranoside and (2'S)-2'-O-(6, 9, 12, 15-octadecatetraenoyl)-3'-O-(5, 8, 11, 14, 17-eicosapentaenoyl)-glyceryl β-D-galactophranoside, respectively.

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