| abstract |
A compound represented by the following formula (1):n nwherein R 1 and R 2 are, for example alkyl; T 1 , T 2 and T 3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A 1 and A 2 are, for example 1,4-cyclohexylene; Z 1 , Z 2 , Z 3 and Z 4 are, for example, a single bond; i, j, k, m and n are, for example 0 or 1; and i+j+k+m+n is, for example 2 or 3. |