2-Hydroxy-6-mercapto-5-methyl-4-pyrimidinecarboxylic acid 2-Hydroxy-6-thio-5-methyl-4-carboxy pyrimidine 4-Pyrimidinecarboxylic acid, 1,2,3,6-tetrahydro-5-methyl-2-oxo-6-thioxo- 4-Pyrimidinecarboxylic acid, 2-hydroxy-6-mercapto-5-methyl- 74039-19-3 NSC98533