NOVEL MONOUNSATURATED FATTY-ACIDS FROM THE SPONGES AMPHIMEDON-COMPRESSA AND MYCALE-LAEVIS

The novel phospholipid aldehydes (Z)-17-tricosenal [1], (Z)-19-pentacosenal [2], and (Z)-19-hexacosenal [3] were characterized in the sponge Amphimedon compressa, together with the novel phospholipid fatty acids (Z)-16-tricosenoic [4], (Z)-18-tricosenoic [5], (Z)-19-pentacosenoic [8], (Z)-20-heptacosenoic [9], and (Z)-21-octacosenoic [10]. The sponge Mycale laevis was shown to have the novel phospholipid fatty acids 16-pentacosenoic [6] and 18-pentacosenoic [7]. Both Caribbean sponges were also shown to have the acid (5Z)-2-methoxy-5-hexadecenoic, an interesting case of alpha-methoxy substitution. These compounds were found to be present in phosphatidylethanolamine, phosphatidylserine, and phosphatidylcholine.