The Isolation And Characterization Of Petrosin From Xestospongia Species A Sponge From The Red Sea

The Sponge Xestospongia sp. from the Red Sea has beenrnehemically investigated. The chloroform soluble portion ofrnthe ethanolic extract of the sponge yielded P-Sl, a minorrnmetabolite which could not be identified, and P-46.rnP-46 was obtained from the chloroform soluble portion of thernethanolic extract by repeated VLC and CC on silica gel;rnrecrystallization yielded colorless rod-shaped crystals (0.002%)rnP-46 was identified as petrosin on the basis of spectralrnstudies including IR, ElMS, 13C Nl>!R, HMQC, one and zn_1H NMRrnas well as by comparison of its spectral and physical datarnwith those reported for petros in. The newly generatedrnHMQC data confirmed the previously assigned structure ofrnpetros in unequivocally

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