Two groups of sterol sulfates were obtained from aq. exts. of E. insignis. The more polar components are sulfated 3β,21-dihydroxy steroids; after solvolysis to remove the sulfate groups these were identified as I [R = H, R1 = (CH2)2C(:CH2)CHMe2 (Q), CH:CHCHMeCHMe2-(E), (CH2)3CHMe2 (Q1), CH:CHCH2CHMe2-(E); R2 = bond, R1 = Q, Q1]. The less polar components are sterol sulfates, which are normal constituents of starfish. The free sterol mixt. contained a low level of cholest-7-en-3β-ol and C26-29 5α-sterols. These findings may explain the apparent absence of asterosaponins in this species.
Steroids from the starfish Euretaster insignis: a novel group of sulfated 3β,21-dihydroxysteroids
PIZZA, Cosimo;RICCIO, Raffaele;
1984-01-01
Abstract
Two groups of sterol sulfates were obtained from aq. exts. of E. insignis. The more polar components are sulfated 3β,21-dihydroxy steroids; after solvolysis to remove the sulfate groups these were identified as I [R = H, R1 = (CH2)2C(:CH2)CHMe2 (Q), CH:CHCHMeCHMe2-(E), (CH2)3CHMe2 (Q1), CH:CHCH2CHMe2-(E); R2 = bond, R1 = Q, Q1]. The less polar components are sterol sulfates, which are normal constituents of starfish. The free sterol mixt. contained a low level of cholest-7-en-3β-ol and C26-29 5α-sterols. These findings may explain the apparent absence of asterosaponins in this species.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
