Ethyl 3,6-dichloro-8-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylate
Ethyl 6-chloro-8-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylate
Ethyl 6-bromo-3-chloro-8-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylate
Ethyl 6-bromo-3-chloroimidazo[1,2-a]pyridine-2-carboxylate