Chiral resolution of (±)-keramaphidin B and isolation of manzamine L, a new β-carboline alkaloid from a sponge Amphimedon sp.

Chiral resolution of (±)-keramaphidin B and isolation of manzamine L, a new β-carboline alkaloid from a sponge Amphimedon sp. Ircinols A and B, first antipodes of manzamine-related alkaloids from an Okinawan marine sponge Keramaphidin B, a novel pentacyclic alkaloid from a marine sponge Amphimedon sp. : A plausible biogenetic precursor of manzamine alkaloids Keramaphidin C and keramamine C plausible biogenetic precursors of manzamine C from an Okinawan marine sponge Ircinals A and B from the Okinawan marine sponge Ircinia sp.: plausible biogenetic precursors of manzamine alkaloids Zamamidines A and B, New Manzamine Alkaloids from the Sponge Amphimedon Species A New Manzamine Congener from Marine Sponge Amphimedon sp. Ma'eganedin A, a new manzamine alkaloid from Amphimedon sponge 6-Hydroxymanzamine A and 3,4-Dihydromanzamine A, New Alkaloids from the Okinawan Marine Sponge Amphimedon sp. 6-Hydroxymanzamine A and 3,4-Dihydromanzamine A, New Alkaloids from the Okinawan Marine Sponge Amphimedon sp.