上游原料
2,5-Dimethoxytetrahydrofuran; 5-Methoxytetrahydro-2-furanyl methyl etherDiethyl ethoxymethylenemalonate; Diethyl 2-(ethoxymethylene)malonate4-fluoro-3-nitroaniline3-amino-4-fluorophenylaminediethyl 2-[(3-amino-4-fluoroanilino)methylene]malonateethyl 7-(acetamido)-6-fluoro-4-hydroxy-3-quinolinecarboxylate7-amino-1-ethyl-6-fluoro-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid
