| http://www.w3.org/ns/prov#value | - The compound according to claim 1, wherein A is a trivalent group selected from the group consisting of a pyrrole group which is unsubstituted or substituted with two groups from the Substituent group ?? and a pyrazole group which is unsubstituted or substituted with one group from the Substituent group ??; R1 is a phenyl group which is unsubstituted or substituted with one or more groups selected
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