14399-13-4 2,18-Porphinedipropionic acid, 3,7,12,17-tetramethyl-8,13-divinyl-, dimethyl ester (VAN) (8CI) 21H,23H-Porphine-2,18-dipropanoic acid, 7,12-diethenyl-3,8,13,17-tetramethyl-, dimethyl ester 43113-71-9 5522-66-7 6164-53-0 64194-56-5 64613-78-1 68079-02-7 75460-43-4 96251-63-7 Dimethyl 3,8,13,17-tetramethyl-7,12-divinyl-21H,23H-porphine-2,18-dipropionate Dimethyl protoporphyrin IX EINECS 226-870-3 NSC 19666 Protoporphyrin IX dimethyl ester Protoporphyrin IX dimethyl ester (VAN)