1 SRM Siroheme 1.000 2 PQ2 3,3',3'',3'''-[(7s,8s,12s,13s)-3,8,13,17-tetrakis(carboxymethyl)-8,13-dimethyl-7,8,12,13,20,24-hexahydroporphyrin-2,7,1 2,18-tetrayl]tetrapropanoic acid 0.984 3 SH0 3,3',3'',3'''-[(1r,2s,3s,4s,7s,8s,11s,12s,13s,16s,19s)-3,8,13,17-tetrakis(carboxylatomethyl)-8,13-dimethyl-1,2,3,4,7,8,11,12,13,16,19,20,22,24-tetradecahydroporphyrin-2,7,12,18-tetrayl]tetrapropanoate 0.984 4 SHN 3,3',3'',3'''-[(7s,8s,12s,13s)-3,8,13,17-tetrakis(carboxymethyl)-8,13-dimethyl-7,8,12,13-tetrahydroporphyrin-2,7,12,18-tetrayl]tetrapropanoic acid 0.984 5 F0L Nickel-sirohydrochlorin 0.969 6 SIR Cobalt sirohydrochlorin 0.969 7 P8X Desmethyl-hba 0.866 8 0UK 3-[(1r,2r,3r,5r,6s,7r,9z,12s,13s,14z,17s,18s,19r)-2,13,18-tris(2-hydroxy-2-oxoethyl)-3,12,17-tris(3-hydroxy-3-oxopropyl)-3,5,8,8,13,15,18,19-octamethyl-1,2,5,6,7,12,17,22-octahydrocorrin-7-yl]propanoic acid 0.853 9 COJ Hydrogenobyrinic acid 0.853 10 8F5 3-[(1~{R},2~{S},3~{S},4~{z},7~{S},8~{S},9~{z},15~{R},17~{R},18~{R},19~{R})-2,7,18-tris(2-hydroxy-2-oxoethyl)-3,13,17-tris(3-hydroxy-3-oxopropyl)-1,2,7,12,12,15,17-heptamethyl-5-prop-2-enyl-3,8,15,18,19,21-hexahydrocorrin-8-yl]propanoic acid 0.829 11 7J8 3-[4-(2-hydroxy-2-oxoethyl)-5-[[4-(2-hydroxy-2-oxoethyl)-5-[[4-(2-hydroxy-2-oxoethyl)-5-[[4-(2-hydroxy-2-oxoethyl)-3-(3-hydroxy-3-oxopropyl)-5-methyl-1~{H}-pyrrol-2-yl]methyl]-3-(3-hydroxy-3-oxopropyl)-1~{H}-pyrrol-2-yl]methyl]-3-(3-hydroxy-3-oxopropyl)-1~{H}-pyrrol-2-yl]methyl]-1~{H}-pyrrol-3-yl]propanoic acid 0.783 12 76R [3,3',3'',3'''-(3,8,13,17-tetramethylporphyrin-2,7,12,18-tetrayl-kappa~4~N~21~,N~22~,N~23~,N~24~)tetra(propanoato)(2-)]manganese 0.750 13 VOV Harderoheme (III) 0.730 14 DHE Heme D 0.723 15 HEV 5,8-dimethyl-1,2,3,4-tetravinylporphine-6,7-dipropionic acid ferrous complex 0.714