| abstract |
Crystal forms of sepiapterin free base selected from polymorphs A, B, C, D, E, F, and G, and combinations thereof, and crystal polymorphs of sepiapterin salts are provided. Also disclosed are pharmaceutical compositions containing one or more such polymorphs and methods for preparing such polymorphs. Sepiapterin is useful for the treatment of many diseases associated with low cellular levels of BH4, such as phenylketonuria. |