Synonyms: 5-(4-Hydroxy-3-nitrophenyl)-8,8-dimethyl-2-[(4-methylbenzyl)sulfanyl]-5,8,9,10-tetrahydropyrimido[4,5-b]quinoline-4,6(3H,7H)-dione;pyrimido[4,5-b]quinoline-4,6(3H,7H)-dione, 5,8,9,10-tetrahydro-5-(4-hydroxy-3-nitrophenyl)-8,8-dimethyl-2-[[(4-methylphenyl)methyl]thio]-