1	HME	Porphycene containing Fe	1.000
2	HNN	Porphycene containing Mn	0.955
3	6HE	6-methy-6-depropionatehemin	0.745
4	FEC	1,3,5,8-tetramethyl-porphine-2,4,6,7-tetrapropionic acid ferrous complex	0.736
5	VEA	5-oxa-protoporphyrin ix containing Fe	0.720
6	7HE	7-methyl-7-depropionatehemin	0.708
7	FDE	Fe(III) deuteroporphyrin ix	0.708
8	1FH	12-phenylheme	0.704
9	2FH	2-phenylheme	0.704