Patent ID: 7074464

Claim:
A compound represented by the formula (1): wherein Ra is alkyl having 1 to 10 carbon(s) and, in that alkyl, any of â€”CH 2 â€” may be replaced with â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”CHâ•CHâ€” or â€”Câ‰¡Câ€” or any of hydrogens may be replaced with halogen or â€”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, decahydro- naphthalene-2,6-diyl or 1,4-bicyclo[2.2.2]octylene and, in such a ring, any â€”CH 2 â€” may be replaced with â€”Oâ€”, any â€”CHâ• may be replaced with â€”Nâ• and any hydrogen may be replaced with halogen; Z 1 , Z 2 and Z 3 are independently a single bond, â€”(CH 2 ) 2 â€”, â€”(CF 2 ) 2 â€”, â€”COOâ€”, â€”OCOâ€”, â€”CH 2 Oâ€”, â€”OCH 2 â€”, â€”CF 2 Oâ€”, â€”OCF 2 â€”, â€”CHâ•CHâ€”, â€”CFâ•CFâ€”, â€”Câ‰¡Câ€”, â€”(CH 2 ) 4 â€”, â€”(CH 2 ) 3 Oâ€” or â€”O(CH 2 ) 3 â€”; p and q are independently 0 or 1.