反应详情

Form I of the compound of formula (I) (0.5 g, as prepared in Example 1) is heated at 60° C. in acetone/water mixture (50/50, vol/vol; 12 mL) for 1 hour. The solids are filtered and dried at 50° C. to provide 0.48 g of Form III.

1. filtrationThe solids are filtered
2. customdried at 50° C.