Gracilosulfates A-G, Monosulfated Polyoxygenated Steroids from the Marine Sponge
Overview
Pharmacology
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Seven new polyoxygenated steroids belonging to a new structural group of sponge steroids, gracilosulfates A-G (-), possessing 3--sulfonato, 56 epoxy (or 5(6)-dehydro), and 4,23-dihydroxy substitution patterns as a common structural motif, were isolated from the marine sponge Their structures were determined by NMR and MS methods. The compounds , and inhibited the expression of prostate-specific antigen (PSA) in 22Rv1 tumor cells.
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