The present invention relates to a crystalline form of 4-amino-2-butoxy-8- (3- (pyrrolidin- 1 -ylmethyl) benzyl) -7,8- dihydropteridin-6 (5H) Solvates and hydrates thereof, and processes for their preparation.본 발명은 4-아미노-2-부톡시-8-(3-(피롤리딘-1-일메틸)벤질)-7,8-디히드로프테리딘-6(5H)-온의 결정질 형태, 용매화물 및 수화물, 및 제조 방법을 제공한다.