1,2-Bis(ethoxycarbonyl)-19-ethenyl-1,22a-dihydro-8,14,18,22a-tetramethyl-23H,25H-benzo(b)porphine-9,13-dipropanoic acid 113719-89-4 23H,25H-Benzo(b)porphine-9,13-dipropanoic acid, 1,2-bis(ethoxycarbonyl)-19-ethenyl-1,22a-dihydro-8,14,18,22a-tetramethyl- Benzoporphyrin D Benzoporphyrin derivative monoacid ring A Bpd-MA