Methyl 6-chloro-3-(3,4-dichlorophenyl)picolinate
Methyl 3-chloro-5-(3,4-dichlorophenyl)isonicotinate
Methyl 5-chloro-3-(3,4-dichlorophenyl)picolinate
Methyl 6-chloro-5-(3,4-dichlorophenyl)nicotinate
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