Synonyms: 2,18-Porphinedipropionicacid, 3,7,12,17-tetramethyl-8,13-divinyl-, dimethyl ester (8CI);21H,23H-Porphine-2,18-dipropanoic acid, 7,12-diethenyl-3,8,13,17-tetramethyl-,dimethyl ester (9CI); Protoporphyrin IX di-Me ester (6CI); Protoporphyrindimethyl ester (7CI); NSC 19666; Protoporphyrin IX dimethyl ester; ProtoporphyrinIX methyl ester