Ethyl 3-(2,3-dichlorophenyl)-5-methoxyisonicotinate
Ethyl 6-(2,3-dichlorophenyl)-5-methoxypicolinate
Ethyl 5-chloro-3-(2,4-dichlorophenyl)picolinate
Ethyl 2-chloro-6-(2,4-dichlorophenyl)isonicotinate
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