Three New Cytotoxic Sesterterpenes from the Marine Sponge Hyrtios cf. erectus

Three New Cytotoxic Sesterterpenes from the Marine Sponge <i>Hyrtios</i> cf. <i>erectus</i> Three New Cytotoxic Sesterterpenes from a Marine Sponge <i>Spongia </i>sp. Antineoplastic Agents. 386. Isolation of Sesterstatins 1−3 from the Marine Sponge <i>Hyrtios </i><i>e</i><i>recta</i>^1† Hyrtioerectines A−C, Cytotoxic Alkaloids from the Red Sea Sponge <i>Hyrtios </i><i>e</i><i>rectus</i> Hyrtioerectines A−C, Cytotoxic Alkaloids from the Red Sea Sponge <i>Hyrtios </i><i>e</i><i>rectus</i> Salmahyrtisol A, a Novel Cytotoxic Sesterterpene from the Red Sea Sponge <i>Hyrtios </i><i>e</i><i>recta</i> Cytotoxic Scalarane Sesterterpenes from a Sponge, <i>Hyrtios</i> <i>erecta</i> Antineoplastic Agents. 542. Isolation and Structure of Sesterstatin 6 from the Indian Ocean Sponge <i>Hyrtios erecta</i> Sesterterpenes from a Common Marine Sponge, Hyrtios erecta Hyrtiosenolides A and B, Two New Sesquiterpene γ-Methoxybutenolides and a New Sterol from a Red Sea Sponge <i>Hyrtios</i> Species