Patent ID: 7442418

Claim:
A compound represented by the following formulae (1′), (2) or (3): CH 2 ═CR 1 —COO-L-E 1 -E 2 -E 3 -R 2 (1′) provided that the symbols in the formula (1′) have the following meanings: R 1 is a hydrogen atom or a methyl group; R 2 is a C 1-8 alkyl group; L is -Cy-COO— (wherein Cy is a trans-1,4-cyclohexylene group), or -Cy-OCO—; and E 1 , E 2 , E 3 are each independently a 1,4-phenylene group or a trans-1,4cyclohexylene group (provided that at least one of E 1 , E 2 and E 3 is a trans-1,4-cyclohexylene group, and in a case where L is -Cy-COO—, E 1 is a trans-1,4-cyclohexylene group), provided that the above 1,4-phenylene group and trans-1,4-cyclohexylene group may be such that a hydrogen atom bonded to a carbon atom in each group may be substituted by a fluorine atom, a chlorine atom or a methyl group; CH 2 ═CR 1 —COO—(CH 2 ) p O-Ph-Cy-Ph-R 2 (2) provided that the symbols in the formula (2) have the following meanings: R 1 is a hydrogen atom or a methyl group; R 2 is a C 1-8 alkyl group; Ph is a 1,4-phenylene group; Cy is a trans-1,4-cyclohexlene group; and p is an integer of from 2 to 8; and CH 2 ═CR 1 —COO-Ph-Cy-Ph-R 2 (3) provided that the symbols in the formula (3) have the following meanings: R 1 is a hydrogen atom or a methyl group; R 2 is a C 1-8 alkyl group; Ph is a 1,4-phenylene group; and Cy is a trans-1,4-cyclohexlene group.