3-Amino-1H-1,2,4-triazole-5-carboxylic acid5-Amino-1H-1,2,4-triazole-3-carboxylic acid5-Amino-2H-1,2,4-triazole-3-carboxylic acid5-Amino-4H-1,2,4-triazole-3-carboxylic acid5-amino-4H-1,2,4-triazole-3-carboxylic acid5-amino-1H-1,2,4-triazole-3-carboxylic acid3-AMino-1,2,4-triazole-5-carboxylic acid