| abstract |
A liquid crystal compound is provided that satisfies at least one physical properties such as high stability to ultraviolet light and heat, a high clearing point, low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy and excellent compatibility with other liquid crystal compounds A liquid crystal composition containing the compound, and a liquid crystal display device including the composition is also provided. n The compound includes a compound represented by formula (1): n nwherein, R a and R b are alkyl; A 1 , A 2 and A 3 are 1,4-cyclohexylene, 1,4-phenylene; G is a divalent group represented by formula (pr-1) or (pr-2);n n nwherein, Z 1 , Z 2 and Z 3 are a single bond or alkylene; and a and b are 0, 1, 2 or 3, and a sum of a and b is 4 or less. |