Culcitosides C2 and C3 from the starfishCulcita novaeguineae

Two steroid glycosides not previously described have been isolated from the digestive system of the starfishCulcite novaeguiniae, and these have been called culcitosides C₂ and C₃. With the aid of chemical and spectral methods, the chemical structure of C₂ has been established as 24-methyl-5-cholestane-3,4,6,8,15,16,28-heptaol 28-O-[O-(2,4-di-O-methyl--D-xylopyranosyl)-(1 2)--L-arabinofuranoside, and that of C₃ as its 4-deoxy analogue.Pacific Ocean Institute of Bioorganic Chemistry of the Far Eastern Scientific Center of the USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 592–596, September–October, 1986.