Synonyms: 5-(4-Ethoxy-3-methoxyphenyl)-2-(isopropylsulfanyl)-8,8-dimethyl-5,8,9,10-tetrahydropyrimido[4,5-b]quinoline-4,6(3H,7H)-dione;pyrimido[4,5-b]quinoline-4,6(3H,7H)-dione, 5-(4-ethoxy-3-methoxyphenyl)-5,8,9,10-tetrahydro-8,8-dimethyl-2-[(1-methylethyl)thio]-