1263-63-4 2,18-Porphinedipropionic acid, 7,12-diethyl-3,8,13, 17-tetramethyl-, dimethyl ester 21H,23H-Porphine-2, 18-dipropanoic acid, 7,12-diethyl-3,8,13,17-tetramethyl-, dimethyl ester AIDS-159870 AIDS159870 Mesoporphyrin IX dimethyl ester Mesoporphyrin dimethyl ester NSC16668