1,2,4-Triazine-6-carboxylic acid, 3-sulfeno- 3-Mercapto-5-hydroxy-1,2,4-triazino-6-carboxylic acid 3-Sulfeno-1,2,4-triazine-6-carboxylic acid 63868-92-8 as-Triazine-6-carboxylic acid, 3-sulfeno-