prov:value
| - More preferably, R3 is a methyl group when manufacturability is taken into consideration. [0065] In the mercapto-substituted imidazolylporphyrin metal complex dimer (hereinafter, sometimes referred to as ???complementarily coordinated dimer???) represented by the general formula (2) of the present invention, R1, M, X, R2, Im and R3 are the same as defined in the case of R1, M, X, R2, Im and R3 of
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