13166-59-1 2-Thio-6-amino-5-methyl-4-carboxy pyrimidine 4-Pyrimidinecarboxylic acid, 1,2-dihydro-6-amino-5-methyl-2-thioxo- 4-Pyrimidinecarboxylic acid, 6-amino-2-mercapto-5-methyl- 6-Amino-2-mercapto-5-methyl-4-pyrimidinecarboxylic acid 6-Amino-2-mercapto-5-methylpyrimidine-4-carboxylic acid BRN 0515667 NSC 98528