Four new metabolites have been isolated from a marine red cyanobacterium, L
yngbya majuscula, collected at Boca del Drago Beach, Bocas del Toro, Panama
. The planar structures were elucidated by 1D and 2D NMR techniques. These
compounds were assigned the trivial names pseudodysidenin (2), dysidenamide
(3), nordysidenin (4), and dragonamide (7).