Isolation and Structure Characterization of Two Novel Bioactive Sulphated Polyhydroxysteroids from the Antarctic OphiuroidOphioderma longicaudum

Abstract
Two novel sulphated polyhydroxysteroids, 1, possessing potent cytotoxic activity, and 2, which proved to be cytoprotective against HIV-1, have been isolated from the Antarctic ophiuroid Ophiosparte gigas, together with the known tetrol disulphated 3. The structures of 1 and 2 have been determined to be cholest-5-ene-2α,3α,4β, 21-tetraol 3, 21-disulphate and cholest-5-ene-2β,3α, 21-triol 2, 21-disulphate, respectively.

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