[N:1]1([C:6]2[CH:7]=[C:8]3[C:13](=[CH:14][CH:15]=2)[N:12]=[C:11]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[N:10]=[CH:9]3)[CH:5]=[CH:4][N:3]=[CH:2]1.O.C([OH:26])CC.C(O)C>C(O)(C)C>[OH2:26].[N:1]1([C:6]2[CH:7]=[C:8]3[C:13](=[CH:14][CH:15]=2)[N:12]=[C:11]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[N:10]=[CH:9]3)[CH:5]=[CH:4][N:3]=[CH:2]150 mg of 6-(1H-imidazol-1-yl)-2-phenylquinazoline are suspended in 4 mL of isopropanol, the suspension is heated at 70° C. for a few minutes, and then filtered and left to evaporate slowly at room temperature, at rest. The crystals obtained are analysed. XRPD: Form B. TGA: weight loss: 6.8% (theoretical value for C17H12N4.H2O: 6.2%), TGA-IR in accordance with the spectrum of H2O for the released vapours. Form B may be obtained analogously from n-propanol and from ethanol.
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