Synonyms: 4H-Pyrimido[6,1-a]isoquinolin-4-one,6-ethyl-2,3,6,7-tetrahydro-9,10-dimethoxy-3-methyl-2-[(2,4,6-trimethylphenyl)imino]-,monohydrochloride (9CI); 4H-Pyrimido[6,1-a]isoquinolin-4-one,6-ethyl-2,3,6,7-tetrahydro-9,10-dimethoxy-3-methyl-2-[(2,4,6-trimethylphenyl)imino]-,monohydrochloride, (?à)-