| http://www.w3.org/ns/prov#value | - Among the compounds represented by Formula (I), more preferred is a compound in which R1 is ???X21a???X22a???Ar3a wherein X21a represents a C1-6 alkylene group (wherein said C1-6 alkylene group may be substituted with 1 to 3 substituent groups selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a C3-8 cycloalkyl group, a C3-8 cycloalkoxy group, a
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