Methyl 5-(2,3,6-trichlorophenyl)-3-(trifluoromethyl)picolinate
Methyl 2-(2,3,6-trichlorophenyl)-5-(trifluoromethyl)isonicotinate
Methyl 3-(2,3,6-trichlorophenyl)-6-(trifluoromethyl)picolinate
Methyl 2-(2,3,5-trichlorophenyl)-6-(trifluoromethyl)isonicotinate