6,7-DIMETHYL-4-HYDROXY-2-MERCAPTOPTERIDINE, 4-hydroxy-2-mercapto-6,7-dimethylpteridine, 6,7-Dimethyl-2-thioxo-2,3-dihydro-1H-pteridin-4-on, 6,7-Dimethyl-4-oxo-2-thioxotetrahydropteridin, 6,7-dimethyl-2-thioxo-2,3-dihydropteridin-4(1H)-one, 6,7-dimethyl-1,2-dihydro-2-thioxopteridin-4(3H)-one, 6,7-dimethyl-2-thioxo-2,3-dihydro-1H-pteridin-4-one