Pachastrissamine, a Cytotoxic Anhydrophytosphingosine from a Marine Sponge, Pachastrissa sp.

Pachastrissamine, a Cytotoxic Anhydrophytosphingosine from a Marine Sponge, Pachastrissa sp. Cytotoxic Sphingosine 4-Sulfates from the Sponge <i>Spirastrella </i><i>a</i><i>bata</i> Cytotoxic Sphingosine 4-Sulfates from the Sponge Spirastrella abata Cytotoxic Alkylpiperidine Alkaloids from the Brazilian Marine Sponge <i>Pachychalina </i><i>alcaloidifera</i> Three New Cytotoxic Sesterterpenes from the Marine Sponge <i>Hyrtios</i> cf. <i>erectus</i> Axinellamide, a new alkaloid from the marine sponge Axinella sp. Tetradehydrohalicyclamine A and 22-Hydroxyhalicyclamine A, New Cytotoxic Bis-piperidine Alkaloids from a Marine Sponge <i>Amphimedon</i> sp. Axinellamide, a new alkaloid from the marine sponge Axinella sp. Ingamines A and B, new cytotoxic alkaloids from the marine sponge Xestospongia ingens Cytotoxic Alkylpiperidine Alkaloids from the Brazilian Marine Sponge Pachychalina alcaloidifera