| http://www.w3.org/ns/prov#value | - When the reducing group represented by B in the present invention is measured by the method described above, an oxidation potential is preferably in a range of from about ???0.3 V to about 1.0 V, more preferably from about ???0.1 V to about 0.8 V, and particularly preferably from about 0 V to about 0.7 V. In formula (Rd), the reducing group represented by B is preferably a residue which is obtaine
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