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 sulphated 3alfa,21-dihydroxy-steroids / D'Auria, MARIA VALERIA; E., Finamore; L., Minale; C., Pizza; R., Riccio; Zollo, Franco; M., Pusset; J., Tirard. - In: JOURNAL OF THE CHEMICAL SOCIETY. PERKIN TRANSACTIONS. I. - ISSN 0300-922X. - STAMPA. - (1984), pp. 2277-2282.
Steroids from the starfish Euretaster insignis: a novel group of sulphated 3alfa,21-dihydroxy-steroids
D'AURIA, MARIA VALERIA;ZOLLO, FRANCO;
1984
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
