3-(Dimethyl-phosphinoylmethyl)-9,10-dimethoxy-2-[(E)-2,4,6-trimethyl-phenylimino]-2,3,6,7-tetrahydro-pyrimido[6,1-a]isoquinolin-4-one

6,7-Dihydro-2-(2,6-dimethylphenoxy)-9,10-dimethoxy-4H-pyrimido-[6,1-a]iso-quinolin-4-one

2-Hydroxyamino-9,10-dimethoxy-6,7-dihydro-pyrimido[6,1-a]isoquinolin-4-one