1,2,3,4-四氢-2-甲基-6-异喹啉胺 、
7-chloro-3-(2,6-dichlorophenyl)-4-imino-1-methyl-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one 、 4-amino-7-chloro-3-(2,6-dichlorophenyl)pyrimido[4,5-d]pyrimidin-2-one 以obtained in Production Example 7的产率得到3-(2,6-dichlorophenyl)-4-imino-1-methyl-7-{[2-methyl-1,2,3,4-tetrahydroisoquinolin-6-yl]amino}-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one