Glycosides of marine invertebrates. XV. A new triterpene glycoside — Holothurin A1 — From Caribbean holothurians of the family Holothuriidae

A glycoside, holothurin A₁ has been isolated from the polar glyosidic fractions of the holothuriansH. floridana andH. grisea. The complete structure of the glycoside has been established; it is: 3β-[0-(3-0-methyl-β-D-glucopyranosyl)-(1 → 3)-0-β-D-glucopyranosyl-(1 → 4)-0-β-D-quinovopyranosyl-(1 → 2)-(4-sulfato-β-D-xylopyranosyl)oxy]holosta-9(11)-ene-12α,17α,22ξ-triol. Details of the IR and¹H and¹³C NMR spectra of the compounds obtained are given.