Molliorin-B,a second scalarin-like pyrroloterpene from the sponge Cacospongia mollior

Summary On the basis of chemical and spectral evidence, structureIV was assigned to molliorin-b, a scalarin-like pyrroloterpene present in the marine sponge Cacospongia mollior. StructureIV was confirmed by synthesis.Acknowledgements. We are grateful to C. Sepe, I. Giudicianni and A. Cantilena (Istituto di Chimica Organica dell'Università di Napoli, Italia) for the technical assistance. This investigation was supported by a grant of the Consiglio Nazionale delle Ricerche, Rome.