1-(环丁基羰基)哌嗪 、
2-氯-4-氨基-6,7-二甲氧基喹唑啉 以to provide analytically pure 4-amino-2-[4-(cyclobutylcarbonyl)-1-piperazinyl]-6,7-dimethoxyquinazoline hydrochloride hydrate, m.p. 267°-268° C. (dec.)(corr.)的产率得到4-amino-2-[4-(cyclobutylcarbonyl)-1-piperazinyl]-6,7-dimethoxyquinazoline hydrochloride hydrate