Synonyms: Coproporphyrin I;NSC 267073;2,7,12,17-Porphinetetrapropionic acid, 3,8,13,18-tetramethyl- (VAN) (8CI);21H,23H-Porphine-2,7,12,17-tetrapropanoic acid, 3,8,13,18-tetramethyl-;21H,23H-Porphine-2,7,12,17-tetrapropanoic acid, 3,8,13,18-tetramethyl- (VAN) (9CI);3,8,13,18-Tetramethyl-21H,23H-porphine-2,7,12,17-tetrapropionic acid;3,3',3'',3'''-(3,8,13,18-tetramethylporphyrin-2,7,12,17-tetrayl)tetrapropanoic acid