N-({4-amino-2-(methylthio)furo[2,3-d]pyrimidin-5-yl}methyl)-N-(2,5-dimethoxyphenyl)methanesulfonamide
5-[(4-acetylphenylamino)methyl]-2-(methylthio)furo[2,3-d]pyrimidin-4-amine
N-(4-acetylphenyl)-N-({4-amino-2-(methylthio)furo[2,3-d]pyrimidin-5-yl}methyl)-4-nitrobenzenesulfonamide
N-({4-amino-2-(methylthio)furo[2,3-d]pyrimidin-5-yl}methyl)-N-(2,5-dichlorophenyl)methanesulfonamide
5-[(4-chlorophenylamino)methyl]-2-(methylthio)furo[2,3-d]pyrimidin-4-amine