1-cyclopentyl-3-(2-fluoro-3,5-dimethoxy-phenyl)-7-methanesulfinyl-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one 、
(2S,3S)-1-amino-2,3,4-butanetriol 在
final product 、
methanol-dichloromethane 作用下,
以to get 0.05 g (11%) as a white solid的产率得到1-cyclopentyl-3-(2-fluoro-3,5-dimethoxy-phenyl)-7-([S,S]-2,3,4-trihydroxy-butylamino)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one