Ethyl 2-chloro-5-(2,3-dichlorophenyl)nicotinate
Ethyl 6-chloro-5-(2,3-dichlorophenyl)picolinate
Ethyl 2-chloro-3-(2,3-dichlorophenyl)isonicotinate
Ethyl 6-chloro-2-(2,3-dichlorophenyl)nicotinate
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