Patent ID: 7183295

Claim:
A compound represented by the following formula (1): wherein each of R 1 and R 2 , which may be identical to or different from each other, represents hydrogen, methyl, or ethyl; each of R 3a , R 3b , R 4a , and R 4b , which may be identical to or different from each other, represents hydrogen, halogen, nitro, hydroxyl, C 1-4 alkyl, trifluoromethyl, C 1-4 alkoxy, C 1-4 alkylcarbonyloxy, di-C 1-4 alkylamino, C 1-4 alkylsulfonyloxy, C 1-4 alkylsulfonyl, C 1-4 alkylsulfinyl, or C 1-4 alkylthio, or R 3a and R 3b , or R 4a and R 4b optionally are linked together to form an alkylenedioxy group; X represents oxygen, sulfur or N—R 5 , wherein R 5 represents hydrogen, C 1-4 alkyl, C 1-4 alkylsulfonyl or C 1-4 alkyloxycarbonyl group; Y represents oxygen, S(O) l , wherein l is 0, 1 or 2, carbonyl, carbonylamino, aminocarbonyl, sulfonylamino, aminosulfonyl, or NH; n is a number from 1 to 6; and m is a number from 2 to 6, or a salt thereof.