Patent ID: 8124760

Claim:
A compound represented by the formula (I) or its salt: wherein R 1 is hydrogen, alkyl which may be substituted by A, cycloalkyl which may be substituted by A, alkenyl which may be substituted by A, alkynyl which may be substituted by A, halogen, cyano, aryl, OR 2 , S(O) n R 3 , NR 4 R 5 or a heterocyclic group which may be substituted by alkyl; R 2 is hydrogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxyalkyl, acetyl or aryl; R 3 is alkyl or acetyl; R 4 is hydrogen or alkyl; R 5 is hydrogen, alkyl, acetyl, CH 2 CH 2 OR 2 or CH 2 CN; A is halogen, OR 2 , S(O) n R 3 , NR 4 R 5 , cyano, alkyl, cycloalkyl, aryl, a heterocyclic group, SCH 2 COOR 2 or —CH(CN) 2 ; X is alkyl, alkenyl, alkynyl, aryl, halogen, haloalkyl, cyano, nitro, NR 4 R 5 , S(O) n R 3 , COR 2 or COOR 2 ; m is an integer of from 1 to 4; and n is an integer of from 0 to 2; provided that 7-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-[1,2,4]-triazolo[1,5-a]pyrimidine is excluded.