(2S-trans)-18-Carboxy-8-ethenyl-13-ethyl-2,3-dihydro-3,7,12,17,20-pentamethyl-21H,23H-porphine-2-propanoic acid 21H,23H-Porphine-2-propanoic acid, 18-carboxy-8-ethenyl-13-ethyl-2,3-dihydro-3,7,12,17,20-pentamethyl-, (2S-trans)- 550-52-7 Chlorin E4 Copper-chlorin E4-disodium salt