3,4-Dihydro-1-ethyl-2-methyl-4-oxo-3-(o-tolyl)quinazolinium perchlorate 78960-21-1 Quinazolinium, 1-ethyl-3,4-dihydro-2-methyl-3-(2-methylphenyl)-4-oxo-, perchlorate Quinazolinium, 3,4-dihydro-1-ethyl-2-methyl-4-oxo-3-(o-tolyl)-, perchlorate