Four novel oxygenated desmosterols, 24 zeta-hydroperoxy-6 beta-hydroxycholesta-4,25-dien-3-one (1), 25-hydroperoxy-6 beta-hydroxycholesta-4,23(E)-dien-3-one (2), 24 zeta-hydroperoxycholesta-4,25-diene-3,6-dione (3), and 25-hydroperoxycholesta-4,23(E)-diene-3,6-dione (4) were isolated from the marine red alga Galaxaura marginata. Steroids 1-4 and three synthetic oxygenated desmosterols 5-7 were shown to exhibit significant cytotoxicity against several cancer cell lines.
No takes yet. Share an insight, caveat, or question.
Sheu et al. (1997) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: