The present invention provides two stable crystalline forms of (1-Hydroxy-2-imidazo[1,2-a]pyridin-3-yl-1-phosphonoethyl) phosphonic acid, designated crystal form X and form Y, as well as methods for their preparation, by which each crystalline polymorph can be individually obtained as a single crystal form.
                            本发明提供了(1-羟基-2-
咪唑[1,2-a]
吡啶-3-基-1-膦乙基)
膦酸的两种稳定的晶体形式,分别称为X晶体形式和Y晶体形式,以及它们的制备方法,通过这些方法,每种晶体多形都可以单独获得。