| abstract |
Means is a compound represented by the formula (1), a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. R 1 and R 2 are independently alkyl of 1 to 15 carbon atoms and the like; Ring A 1 , ring A 2 , and ring A 3 are independently 1,4-cyclohexylene, 1,4-phenylene, and the like; Z 1 , Z 2 , and Z 3 are, independently, a single bond or the like. |