Patent ID: 8722929

Claim:
A compound of formula A where Ar is phenyl U=—C(R m )═; R a and R′ a are, independently, H, F, Cl, methyl, methoxy, fluoromethyl, difluoromethyl, or trifluoromethyl; R m is H, F, Cl, methyl, fluoromethyl, difluoromethyl, trifluoromethyl or methoxy; R′ m is F, Cl, fluoromethyl, difluoromethyl, trifluoromethyl or methoxy; R N is H or C 1 -C 4 alkyl, which may be straight-chain, branched, or cyclic; and R O is H, isopropyl, sec-butyl, or straight-chain C 1 -C 8 alkyl, alkenyl, or alkynyl, any of which may be substituted by methyl, fluoro, chloro methoxy, phenyl, or benzoyloxy, where the methyl, methoxy, phenyl, and benzyl groups are optionally substituted with one or two fluorine atoms or one or two chlorine atoms.