abstract |
The invention relates to a compound represented by formula (1), a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. R is C1-15 alkyl, etc.; ring A 1 And ring A 2 Independently 1, 4-cyclohexylene, 1, 4-phenylene, etc.; z 1 And Z 2 Independently a single bond, -COO-, etc.; y is 1 、Y 2 And Y 3 Independently hydrogen, fluorine or chlorine; m is 0, 1, or 2. |