110548-06-6 (左氧氟沙星杂质K,ethyl (R)-(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylate)

左氧氟沙星杂质K;

ethyl (R)-(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylate;ethyl (R)-9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate;Levofloxacin Impurity 3;.(+)-ethyl 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylate;.(+)-ethyl 9,10-difluoro-3(R)-methyl-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylate;.Ethyl (R)-(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylate;.ethyl-9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido-[1,2,3-de]-1,4-benzoxazin-carboxylate;ethyl (3R)-9,10-difluoro-3-meth;F19504;Levofloxacin Impurity 9;7H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-, ethyl ester, (3R)-;Ethyl (3R)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylate;7H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-, ethyl ester, (R)-;ethyl (2R)-6,7-difluoro-2-methyl-10-oxo-4-oxa-1-azatricyclo[7.3.1.05,13]trideca-5(13),6,8,11-tetraene-11-carboxylate;Ethyl(r)-9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7h-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate;7UK9K5W2Q7;110548-06-6;

TZSXJUSNOOBBOP-SSDOTTSWSA-N

1S/C15H13F2NO4/c1-3-21-15(20)9-5-18-7(2)6-22-14-11(17)10(16)4-8(12(14)18)13(9)19/h4-5,7H,3,6H2,1-2H3/t7-/m1/s1

FC1=C(C=C2C(C(C(=O)OCC)=CN3C2=C1OC[C@H]3C)=O)F