| 摘要 |
A compound represented by the formula (1). wherein Ra is alkyl having 1 to 10 carbon(s) and, in that alkyl, any of -CH2- may be replaced with -O-, -S-, -CO-, -CH=CH- or -C=C- or any of hydrogens may be replaced with halogen or -CN; A<1>, A<2 >and A<3 >are independently 1,4-cycolohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,4-bicyclo[2.2.2]octylene and, in such a ring, any -CH2- may be replaced with -O-, any -CH= may be replaced with -N= and any hydrogen may be replaced with halogen; Z<1>, Z<2 >and Z<3 >are independently a single bond, -(CH2)2-, -(CF2)2-, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O-, -OCF2-, -CH=CH-, -CF=CF-, -C=C-, -(CH2)4-, -(CH2)3O- or -O(CH2)3-; p and q are independently 0 or 1. Also provided is a liquid crystal composition containing the same and a liquid crystal display element containing the composition.
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