Aplysillamides A and B, new antimicrobial guanidine alkaloids from the Okinawan marine sponge Psammaplysilla purea

Aplysillamides A and B, new antimicrobial guanidine alkaloids from the Okinawan marine sponge Psammaplysilla purea Purealidins B and C, new bromotyrosine alkaloids from the okinawan marine sponge psammaplysilla purea Purealidins E-G, New Bromotyrosine Alkaloids from the Okinawan Marine Sponge Psammaplysilla purea Purealidin D, a new pyridine alkaloid from the okinawan marine sponge psammaplysilla purea Zamamiphidin A, a New Manzamine Related Alkaloid from an Okinawan Marine Sponge Amphimedon sp. Lipopurealins D and E and Purealidin H, New Bromotyrosine Alkaloids from the Okinawan Marine Sponge Psammaplysilla purea Purealidins E-G, New Bromotyrosine Alkaloids from the Okinawan Marine Sponge Psammaplysilla purea Zamamiphidins B and C, Manzamine-Related Alkaloids from an Amphimedon sp. Marine Sponge Collected in Okinawa New bromotyrosine alkaloids from the marine sponge Psammaplysilla purpurea Lipopurealins D and E and Purealidin H, New Bromotyrosine Alkaloids from the Okinawan Marine Sponge Psammaplysilla purea