[Subject] One object of the invention is a compound useful as an
antioxidant. Other objects include a
liquid crystal composition having high stability to
ultraviolet light and heat, and a device that hardly undergoes a decrease in
voltage holding ratio even after a long-time use.[Solution] The invention relates to a compound represented by formula (1), a
liquid crystal composition to which the compound is added, and a
liquid crystal display device containing the composition.In formula (1), R1 is
hydrogen or
alkyl having 1 to 20 carbons, or the like; R2 and R3 are independently methyl, ethyl,
isopropyl, or t-butyl; ring A is 1,4-cyclohexylene, 1,4-
phenylene or the like; Z is a
single bond or alkylene having 1 to 6 carbons, or the like; and m is 0, 1, or 2.