Prulifloxacin Impurity 2

Chemical Name: 7-(4-(((1-(4-(3-carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)piperazin-1-yl)-3-oxobutan-2-yl)oxy)carbonyl)piperazin-1-yl)-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid