Δ5,7-Sterols were isolated as pure compds. from the marine sponges I. pipetta (Dictyoceratida:Thorectidae) and D. avara (Dictyoceratida:Dysideidae) by reversed-phase HPLC and analyzed by gas-liq. chromatog., U.V., mass spectrometry, and 1H-NMR. I. pipetta And D. avara had rather similar sterol compns. and contained predominantly Δ5,7-sterols, accompanied by α5-sterols. Ergosterol, cholesta-5,7-dien-3β-ol, and 24-ethylcholesta-5,7-dien-3β-ol were the major sterols in I. pipetta, whereas D. avara contained in addn. to these 3 sterols, (24X)-24-ethylcholesta-5,7,24(28)-trien-3β-ol as the 4th major sterol. Cholesta-5,7,24-trien-3β-ol which previously was not isolated from a marine organism is also present
Δ5,7Sterols from the sponges Ircinia pipetta and Dysidea avara. Identification of cholesta-5,7,24-trien-3β-ol / Sica, D.; Piccialli, Vincenzo; Pronzato, R.. - In: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY. - ISSN 0305-0491. - STAMPA. - 88B:1(1987), pp. 293-296. [10.1016/0305-0491(87)90117-9]
Δ5,7Sterols from the sponges Ircinia pipetta and Dysidea avara. Identification of cholesta-5,7,24-trien-3β-ol
PICCIALLI, VINCENZO;
1987
Abstract
Δ5,7-Sterols were isolated as pure compds. from the marine sponges I. pipetta (Dictyoceratida:Thorectidae) and D. avara (Dictyoceratida:Dysideidae) by reversed-phase HPLC and analyzed by gas-liq. chromatog., U.V., mass spectrometry, and 1H-NMR. I. pipetta And D. avara had rather similar sterol compns. and contained predominantly Δ5,7-sterols, accompanied by α5-sterols. Ergosterol, cholesta-5,7-dien-3β-ol, and 24-ethylcholesta-5,7-dien-3β-ol were the major sterols in I. pipetta, whereas D. avara contained in addn. to these 3 sterols, (24X)-24-ethylcholesta-5,7,24(28)-trien-3β-ol as the 4th major sterol. Cholesta-5,7,24-trien-3β-ol which previously was not isolated from a marine organism is also presentI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
