7-(2,6-dichlorophenyl)-5-methyl-3-(methylthio)pyrido[4,3-e][1,2,4]triazin-8(7H)-one

6-(2-chloro-6-hydroxyphenyl)-8-methyl-2-(methylthio)pyrido[4,3-d]pyrimidin-5(6H)-one

6-(2,6-dichlorophenyl)-2-(methylthio)-5-oxo-5,6-dihydropyrido[4,3-d]pyrimidine-8-carbaldehyde

6-(2,6-dichlorophenyl)-8-methyl-2-(methylthio)pyrido[4,3-d]pyrimidin-5(6H)-one