abstract |
Type I crystal of 1- (2'-cyano-2'-deoxy-β-D-arabinofuranosyl) cytosine monohydrochloride having characteristic peaks at 13.7 °, 15.7 °, 16.0 °, 18.6 ° , 20.3 °, and 22.7 ° as diffraction angles (2 + - 0.1 °) measured by powder X-ray diffraction, and having a melting point of 192 ° C to 197 ° C. |