Patent ID: 8039514

Claim:
A compound represented by Formula (1) or a salt thereof: wherein, A represents an optionally substituted aryl group; R 1 represents the following Formula (R 1a ) or (R 1b ): [in the Formulae (R 1a ) and (R 1b ), Ar 1 represents the following Formula (Ar 1a ), (Ar 1b ) or (Ar 1c ): (R 5 and R 6 each independently represents a hydrogen atom, a halogen atom, an optionally substituted lower alkyl group, an optionally substituted lower alkoxy group, or a cyano group); Ar 2 represents the following Formula (Ar 2a ), (Ar 2b ) or (Ar 2c ): (R 7 and R 8 each independently represents a hydrogen atom, a hydroxyl group, a halogen atom, an optionally substituted lower alkyl group, an optionally substituted lower alkoxy group, an optionally substituted amino group, a nitro group, a cyano group, SOCH 3 group, SO 2 CH 3 group, a lower acyl group, or R 7 and R 8 together form -COOCH 2 - or - CH 2 CH 2 O- ; R 9 represents a hydrogen atom or -J-COOR 10 ; J represents a covalent bond, an optionally substituted alkylene having 1 to 5 carbon atoms, an optionally substituted alkenylene having 2 to 5 carbon atoms, or an optionally substituted alkynylene having 2 to 5 carbon atoms, wherein one carbon atom in said alkylene, alkenylene and alkynylene groups may be replaced by an oxygen atom, a sulfur atom, NR 11 , CONR 11 , or NR 11 CO at any chemically allowable position; R 11 represents a hydrogen atom or a lower alkyl group; and R 10 represents a hydrogen atom or a lower alkyl group); and p represents 0 or 1]; R 2 represents a hydrogen atom or a lower alkyl group; R 3 and R 4 each independently represents a lower alkyl group, or R 3 and R 4 together form an alkylene having 2 to 6 carbon atoms; * represents an asymmetric carbon atom; and m represents an integer of 1 to 3.