| http://www.w3.org/ns/prov#value | - n A represents an electron attracting group, B represents an electron releasing group group, n is an integer of 0 or 1, and a benzene ring includes a derivative thereof, and [0014] wherein A represents an electron attracting group, B represents an electron releasing group group, Y represents ???C(CF3)2??? or ???SO2???, and a benzene ring includes a derivative thereof. [0015] It should be noted tha
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