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Cordiachromes from Auxemma oncocalyx

1995; Elsevier BV; Volume: 40; Issue: 6 Linguagem: Inglês

10.1016/0031-9422(95)00397-p

1873-3700

Otília Deusdênia Loiola Pessoa,

Marine Sponges and Natural Products

Further cordiachromes, rel-10α,11β-epoxy-11α-ethoxy-8α-hydroxy-2-methoxy-8aβ-methyl-5,6,7,8,8a,9,10aβ-octahydro-1,4-anthracendione, 6-formyl-2-methoxy-9-methyl-7,8-dihydro-1,4-phenanthrendione, rel-8α,11α;9α,11α-diepoxy-1,4-dihydroxy-2-methoxy-8aβ-methyl-5,6,7,8,8a,9,10,10aβ-octahydro-10-anthracenone, rel-9α,11α-epoxy-1,4,8α-trihydroxy-2-methoxy-8aβ-methyl-5,6,7,8,8a,9,10,10aβ-octahydro-10-anthracenone, rel-2″-methoxy-7″-methyl-1″,4″-naphtalendione-(6″→5)-tetrahydropyran-(2-eq→O→2ax)-tetrahydropyran-(5′→6‴)- 2‴-methoxy-7‴-methyl-1‴,4‴-naphthalendione, together with the known, allantoin, sitosterol and 3β-O-d-glucopyranosylsitosterol, have been isolated from Auxemma oncocalyx. Their structures were determined from spectral data, including 2D NMR experiments.