Halichonines A, B, and C, novel sesquiterpene alkaloids from the marine sponge Halichondria okadai Kadota

Halichonines A, B, and C, novel sesquiterpene alkaloids from the marine sponge Halichondria okadai Kadota Halichonadins A–D, new sesquiterpenoids from a sponge Halichondria sp. Halichonadin F and the Cu(I) Complex of Halichonadin C from the Sponge <i>Halichondria</i> sp. Halichonadin F and the Cu(I) Complex of Halichonadin C from the Sponge Halichondria sp. Halichonadin E, a Dimeric Sesquiterpenoid from the Sponge <i>Halichondria</i> sp. A tetracyclic diamine alkaloid, halicyclamine A, from the marine sponge Haliclona sp Halichonadin E, a Dimeric Sesquiterpenoid from the Sponge Halichondria sp. Halichondramine, a New Tetracyclic Bipiperidine Alkaloid from the Marine Sponge Halichondria sp. Tetradehydrohalicyclamine A and 22-Hydroxyhalicyclamine A, New Cytotoxic Bis-piperidine Alkaloids from a Marine Sponge Amphimedon sp. Tetradehydrohalicyclamine A and 22-Hydroxyhalicyclamine A, New Cytotoxic Bis-piperidine Alkaloids from a Marine Sponge <i>Amphimedon</i> sp.