1989 Volume 37 Issue 1 Pages 61-67
A full account of the structure elucidation of four lanostane-type triterpene oligoglycosides, bivittosides A(6), B(8), C(9), and D (10), is presented. Bivittosides were isolated from body-walls and Cuvierian tubules of the Okinawan sea cucumber Bohadschia bivittata MITSUKURI, and among these four oligoglycosides, bivittoside D(10) showed significant antifungal activities. Acidic hydrolysis of bivittosides A(6), B(8), and D(10) provided three artifact sapogenols, among which a homoannular-dienic sapogenol named preseychellogenin (4), exhibiting characteristically red-shifted ultraviolet and circular dichroism spectra, was identified as the monoacetate (4a).