Sa. Avilov et al., STRUCTURE OF CUCUMARIOSIDE G(2), A NOVEL NONHOLOSTANE GLYCOSIDE FROM THE SEA-CUCUMBER EUPENTACTA-FRAUDATRIX, Journal of natural products, 57(8), 1994, pp. 1166-1171
The new triterpene glycoside cucumarioside G(2) [1] has been isolated
from the sea cucumber Eupentacta fraudatrix. Glycoside 1 is the first
triterpene glycoside with the 23,24,25,26,27-pentanorlanostane type of
aglycone. Its structure has been established by chemical transformati
ons as well as C-13- and H-1-nmr, eims, and liquid sims studies.