New xenicane diterpenoids from the gorgonian Acalycigorgia inermis

Acalycixeniolides C-F (1-4), four new diterpenoids of the xenicane class, have been isolated from the gorgonian Acalycigorgia inermis. The structures of these compounds have been determined by combined spectroscopic methods. These compounds exhibited cytotoxicity against a human leukemia cell-line.