Ethyl 6,7-dichloro-3-trifluoromethyl-1,4-dihydroquinoxaline-2-carboxylate

Ethyl 6,7-dichloro-1,4-dihydro-3-(trifluoromethyl)quinoxaline-2-carboxylate

Ethyl 6,7-dichloro-3-(trifluoromethyl)-1,4-dihydroquinoxaline-2-carboxylate