Antineoplastic Agents. 277. Isolation and Structure of Phakellistatin 3 and Isophakellistatin 3 from a Republic of Comoros Marine Sponge

The Western Indian ocean sponge Phakellia carteri was found to contain two isomeric (at the photo-Trp indole ring juncture) cyclo-heptapeptides named phakellistatin 3 (3) and isophakellistatin 3 (4)