. "7-(3-Amino-pyrrolidin-1-yl)-1-(2,4-difluoro-phenyl)-6-fluoro-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid; compound with toluene-4-sulfonic acid" . "tosufloxacin" . . . . . . . . . . . . . . .