Cytotoxic effects of three new metabolites from Red Sea marine sponge, Petrosia sp.

Abstract Marine sponges represent an affluent source of biogenetically unprecedented array 
of biologically active compounds. This study revealed the isolation of ten compounds from 
marine sponge of Petrosia sp. Their chemical structures were determined by using 1D and 
2D NMR, UV, IR and MS measurements. A polyoxygenated steroid (3β, 7β, 9α-
trihydroxycholest-5-en (1), a purine-derivative (3, 7-dimethyl-2-(methylamino)-3H-purin-6 
(7H)-one (2) and a sphingolipid (N-((3S, E)-1, 3-dihydroxytetracos-4-en-2-yl) stearamide ( ...