7-{(3S,4S)-3-[(cyclopropylamino)methy]-4-fluoropyrrolidine-1-yl}-6-fluoro-1-(2-fluoroethyl)-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid crystal

摘要

　The purpose of the present invention is to provide a hydrochloride crystal, a hydrochloride hydrate crystal, and a methanesulfonate crystal of the compound represented by formula (1).　These crystals are less susceptible to decomposition caused by the effects of light, and also have high preservation stability and high water solubility compared to a free crystal of the compound (1).