21H,23H-Porphine-2,18-dipropanoic acid, 7,12-diethyl-3,8,13,17-tetramethyl-, dihydrochloride 493-90-3 68938-72-7 7,12-Diethyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropionic acid dihydrochloride EINECS 273-141-0 Mesoporphyrin IX, dihydrochloride