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(57) Abstract: A novel compound suitable as an additive for a ferroelectric liquid crystal material is provided. SOLUTION: embedded image (In the formula, R 1 and R 2 are each independently a chain alkyl group having 1 to 18 carbon atoms, a chain alkenyl group having 3 to 18 carbon atoms, a chain alkynyl group having 3 to 18 carbon atoms, or an alkoxy moiety having carbon atoms. 1 to 3 is a chain alkoxyalkyl group in which the alkyl part has 1 to 18 carbon atoms, and n is 1 to 3 G 1 and G 3 are a single bond, ether, —COO -, - OCO- and -CO-; G 2 represents a CN or a hydrogen atom; X represents a hydrogen atom, a halogen atom, a cyano group. ). |