Patent ID: 8383826

Claim:
A compound of formula (2): wherein: R 1 is: H; linear or branched (C 1 -C 6 )alkyl, optionally substituted by one or more substituents selected from (C 3 -C 7 )cycloalkyl and (C 5 -C 7 )cycloalkenyl; (C 3 -C 7 )cycloalkyl; (C 5 -C 7 )cycloalkenyl; linear or branched (C 2 -C 6 )alkenyl; or linear or branched (C 2 -C 6 )alkynyl; R 2 is cyclopropylmethyl; and R 3 is one or more substituents independently selected from the group consisting of H, CN, NO 2 , CF 3 and a halogen atom, or an N-oxide on the pyridine ring thereof.