The lipid fraction of the Pacific sponge Jereicopsis graphidiophora has been investigated for its sterol compn. Although the conventional 3β-hydroxysteroids were totally absent, the exts. contained unique 3β-methoxysteroids. Fifteen 3β-methoxysteroids with six different nuclei [Δ7,9(11), Δ8,14, Δ8, Δ7, Δ5, 5α-satd.] and with five usual C8-C10 side chains, have been identified. In addn., the exts. also contained 3β-methoxysteroids with oxygenated functionalities in the nuclei: Δ7-9α,11α-epoxy-, Δ7-9-hydroxy-, Δ8-7-one, Δ8-14-hydroxy, Δ9(11)-8α,14α-epoxy. Characterization was accomplished by GC-MS, HREIMS, 1H-NMR, 13C-NMR, FT-IR, and UV spectroscopy.
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