4-di(tert-butoxycarbonyl)amino-2-(4-methoxy-3,5-dimethyl-pyridin-2-ylmethyl)-8-oxo-2,7,8,9-tetrahydro-6-thia-1,2,3,5-tetraazabenzo[cd]azulene 以22%的产率得到N8-Cyclopropyl-2-[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]-2,7,8,9-tetrahydro-6-thia-1,2,3,5-tetraazabenzo[cd]azulene-4,8-diamine hydrochloride