| abstract |
The compound represented by Formula (1). In formula (1), R1 is hydrogen, alkyl, etc .; ring A1 and ring A2 are independently 1,4-cyclohexylene, 1,4-phenylene, etc .; Z1, Z2, and Z3 are independently A single bond, —C≡C—, etc .; L 1, L 2 and L 3 are independently hydrogen, chlorine or fluorine; a and b are independently 0, 1, 2, 3 or 4, And the sum of a and b is 4 or less. |