(3S)-ethyl 9-(1-cyano-2-ethoxy-2-oxoethyl)-10-fluoro-3-methyl-7-oxo-3,7-dihydro-2H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
(3S)-ethyl 9-(1-cyano-2-ethoxy-2-oxoethyl)-10-fluoro-3-methyl-7-oxo-3,7-dihydro-2H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate