Patent ID: 7589086

Claim:
A compound of pyrazolo[3,4-d]pyrimidine having the formula wherein: X=N; R=H, alkylthio, or aminoalkylthio; R 1 =NHcyclopropyl, NHC 3 H 7 , NHC 4 H 9 , N(CH 2 CH 3 ) 2 , NHCH 2 CH 2 OC 2 H 5 , 1-pyrrolidinyl, 1-piperidinyl, or 4-morpholinyl, NHcyclohexyl, 1-hexahydroazepinyl, NHCH 2 C 6 H 5 , or NHCH 2 CH 2 C 6 H 5 ; wherein R 3 =H, halogen, or alkyl and R 5 =Cl, Br or OH.