1,2,3,4-Tetrahydro-3-ethyl-4-methylquinazolin-2-one 2(1H)-Quinazolinone, 3-ethyl-3,4-dihydro-4-methyl- 3-Ethyl-3,4-dihydro-4-methyl-2(1H)-quinazolinone 32150-47-3