Patent ID: 8889666

Claim:
A compound represented by the following Formula (I) or a salt thereof, wherein m is 1 or 2; n is 1 or 2; R 1 is a hydrogen atom or a C 1 -C 4 alkyl group; and R 2 , R 3 , and R 4 are the same or different, and are each a hydrogen atom, a halogen atom, a C 1 -C 4 alkyl group, or a group represented by Formula (a): —CH 2 —N(R 5 )(R 6 ) (a) wherein R 5 and R 6 are the same or different and each represents a hydrogen atom or a C 1 -C 4 alkyl group, or R 5 and R 6 may form a heterocycloalkyl group having a 4 to 6 membered-ring, together with the nitrogen atom bound thereto.