Five sulfated steroidal glycosides were isolated from the aq. exts. of the whole bodies of the starfish A. scoparius. One of them was identified as indicoside B, a sulfated steroidal xylofuranoside previously isolated from A. indicus, and the remaining 4 are new compds. Three of them, scopariosides A, B, and C (I, II, and III, resp.) have the same (24SS)-5a-cholestane-3β,6α,8,15β,24-pentaol aglycon as indicoside B but differ in the sugar moieties. The aglycon is also present in the aq. exts. as 24-O-sulfate deriv. The 4th new glycoside, scoparioside D (IV) was also identified. These glycosides are accompanied by 4 known polyhydroxysteroids and 1 known asterosaponin, the hexaglycoside marthasteroside A1.
Starfish saponins, 45. Novel sulfated steroidal glycosides from the starfish Astropecten scoparius
RICCIO, Raffaele;
1990
Abstract
Five sulfated steroidal glycosides were isolated from the aq. exts. of the whole bodies of the starfish A. scoparius. One of them was identified as indicoside B, a sulfated steroidal xylofuranoside previously isolated from A. indicus, and the remaining 4 are new compds. Three of them, scopariosides A, B, and C (I, II, and III, resp.) have the same (24SS)-5a-cholestane-3β,6α,8,15β,24-pentaol aglycon as indicoside B but differ in the sugar moieties. The aglycon is also present in the aq. exts. as 24-O-sulfate deriv. The 4th new glycoside, scoparioside D (IV) was also identified. These glycosides are accompanied by 4 known polyhydroxysteroids and 1 known asterosaponin, the hexaglycoside marthasteroside A1.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
