6-tert-Butyl-4-[(S)-3-(4-methyl-furazan-3-ylmethoxy)-pyrrolidin-1-yl]-1-(4-methyl-furazan-3-ylmethyl)-1H-pyrazolo[3,4-d]pyrimidine 、
乙氧基亚甲基丙二腈 以isolated (298 mg, 49%) as yellow solid的产率得到5-Amino-1-(4-methyl-furazan-3-ylmethyl)-1H-pyrazole-4-carbonitrile