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2,18-Dimethyl 7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoate5522-66-7100 % similar Protoporphyrin IX553-12-876 % similar Protoporphyrin disodium50865-01-573 % similar Hemin16009-13-547 % similar Heme B14875-96-845 % similar Hematoporphyrin14459-29-141 % similar Hematoporphyrin dihydrochloride17696-69-440 % similar Chlorin E619660-77-639 % similar Pyropheophorbide A24533-72-039 % similar Chlorophyll A479-61-831 % similar