3-(2-((3-(2-Carboxyethyl)-5-((4-ethylidene-3-methyl-2-oxo-3,4-dihydro-2H-pyrrol-5-yl)methylene)-4-methyl-1,5-dihydro-2H-pyrrol-2-ylidene)methyl)-5-((4-ethyl-3-methyl-5-oxo-1,5-dihydro-2H-pyrrol-2-ylid\tene)methyl)-4-methyl-1H-pyrrol-3-yl)propanoic acid AIDS-160517 AIDS160517 Extracted from algae NSC633984