上游原料
ethyl 3-(2,6-dichloro-5-fluoro-3-pyridinyl)-3-oxopropanoateethyl (Z)-2-[(2,6-dichloro-5-fluoro-3-pyridinyl)carbonyl]-3-(2,4-difluoroanilino)-2-propenoate2,4-difluoroaniline; 2,4-difluorophenylamine；2,4-Difluoro-benzenamine;1-Amino-2,4-difluorobenzenetert-butyl 3-pyrrolidinylcarbamateethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,2,3,4-tetrahydro[1,8]naphthyridine-3-carboxylate7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,2,3,4-tetrahydro[1,8]naphthyridine-3-carboxylic acid7-[3-[(tert-butoxycarbonyl)amino]-1-pyrrolidinyl]-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,2,3,4-tetrahydro[1,8]naphthyridine-3-carboxylic acidtert-butyl 1-[8-(2,4-difluorophenyl)-3-fluoro-5-oxo-5,6,7,8-tetrahydro[1,8]naphthyridin-2-yl]-3-pyrrolidinylcarbamatetert-butyl 1-[8-(2,4-difluorophenyl)-3-fluoro-6-formyl-5-hydroxy-7,8-dihydro[1,8]naphthyridin-2-yl]-3-pyrrolidinylcarbamatetert-butyl 1-[8-(2,4-difluorophenyl)-3-fluoro-6-formyl-5-oxo-5,8-dihydro[1,8]naphthyridin-2-yl]-3-pyrrolidinylcarbamate
