A. Rudi et Y. Kashman, AAPTOSINE - A NEW CYTOTOXIC 5,8-DIAZABENZ[CD]AZULENE ALKALOID FROM THE RED-SEA SPONGE AAPTOS AAPTOS, Tetrahedron letters, 34(29), 1993, pp. 4683-4684
A novel heteroaromatic substance, aaptosine has been isolated from the
Red Sea sponge Aaptos aaptos and its structure has been determined to
be S on the basis of spectral data and chemical transformation to the
two N-methyl derivatives 6 and 7.