2,18-Porphinedipropionic acid, 3,8,13,17-tetramethyl-7,12-divinyl- 2,18-Porphinedipropionic acid, 3,8,13,17-tetramethyl-7,12-divinyl- (8CI) 21H,23H-Porphine-2,18-dipropanoic acid, 7,12-diethenyl-3,8,13,17-tetramethyl- 3,3'-(3,7,12,17-Tetramethyl-8,13-divinylporphine-2,18-diyl)di(propionic acid) 3,7,12,17-Tetramethyl-8,13-divinyl-2,18-porphinedipropionic acid 553-12-8 Kammerer's porphyrin Ooporphyrin Protoporphyrin Protoporphyrin IX (6CI) Protoporpyrin IX