New Scalarane Sesterterpenoids from the Formosan Sponge Ircinia felix

摘要

Five new scalarane sesterterpenoids, felixins A–E (>1–>5), were isolated from the Formosan sponge Ircinia felix. The structures of scalaranes >1–>5 were elucidated on the basis of spectroscopic analysis. Cytotoxicity of scalaranes >1–>5 against the proliferation of a limited panel of tumor cell lines was evaluated.