Jaspiferin A and B: Two New Secondary Metabolites from the South China Sea Sponge Jaspis stellifera

 A chemical investigation of marine sponge Jaspis stellifera, collected from South China Sea, led to the isolation of two new compounds, Jaspiferin A and B (1-2), and six known compounds, gibepyrone F (3) , p- hydroxy benzaldehyde (4) , 3-Indole-3-aldehyde (5) , Thymine (6) , 24(28)-dehydroaplysterol (7) , (25s)-26- methylene-cholest-4-en-3-one (8). Their structures were determined by extensive spectroscopic analysis in association with physical and chemical properties, as well as comparison of their spectral data with these reported in literatures. The biogenetic transformation of compound 2was also speculated.