摘要 |
The invention relates to compounds represented by Formula (1): wherein R<SUP>a </SUP>is alkyl or the like; R<SUP>b </SUP>is fluorine or -CF<SUB>3</SUB>; A is 1,4-cyclohexylene, 1,4-phenylene or the like; Z is a single bond, alkylene or the like; Y is a single bond, alkylene or the like; and m and n are an integer of approximately 0 to approximately 5.
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