A reinvestigation of the exts. from the starfish Distolasterias nipon, collected at Mutsu Bay, Japan, has led to the isolation of six glycosides of polyhydroxysteroids and six asterosaponins. Four steroidal glycosides have been identified as distolasterosides D1 and D2 (previously isolated from the same organism), and pycnopodioside C and pisasteroside A, previously found in the related species Pycnopodia helianthoides and Pisaster ochraceus (family Asteridae), resp. Two asterosaponins have been identified as the common versicoside A and thornasteroside A. The 2 remaining glycosides of polyhydroxysteroids, named distolasterosides D4 and D5, and 4 asterosaponins designated nipoglycosides A, B , C, and D are new compds., and their structures have been elucidated mainly by interpretation of spectral data and comparison with known compds.
Starfish Saponins, Part 51. Steroidal Oligoglycosides from the Starfish Distolasterias nipon
RICCIO, Raffaele;
1993-01-01
Abstract
A reinvestigation of the exts. from the starfish Distolasterias nipon, collected at Mutsu Bay, Japan, has led to the isolation of six glycosides of polyhydroxysteroids and six asterosaponins. Four steroidal glycosides have been identified as distolasterosides D1 and D2 (previously isolated from the same organism), and pycnopodioside C and pisasteroside A, previously found in the related species Pycnopodia helianthoides and Pisaster ochraceus (family Asteridae), resp. Two asterosaponins have been identified as the common versicoside A and thornasteroside A. The 2 remaining glycosides of polyhydroxysteroids, named distolasterosides D4 and D5, and 4 asterosaponins designated nipoglycosides A, B , C, and D are new compds., and their structures have been elucidated mainly by interpretation of spectral data and comparison with known compds.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
