| 摘要 |
PROBLEM TO BE SOLVED: To provide stable quality crystals of N-benzyl-N-ethyl-2-(7-methyl-8-oxo-2-phenyl-7,8-dihydro-9H-purin-9-yl)acetamide, useful as a medicine. SOLUTION: Theα-type crystal,γ-type crystal andδ-type crystal of N-benzyl-N-ethyl-2-(7-methyl-8-oxo-2-phenyl-7,8-dihydro-9H-purin-9-yl)acetamide, having excellent thermal stability, characterized by powder X-ray diffraction patterns and/or differential scanning calorimetric analysis thermogram. COPYRIGHT: (C)2008,JPO&INPIT
|
