Allopurinol EP Impurity - A

5-Amino-4-pyrazolecarboxamide; 3-Amino-1H-pyrazole-4-carboxamide; 3-Amino-4-carbamoylpyrazole; 3-Amino-4-pyrazolecarboxamide; 4-Carboxamide, 5-amino-1H-pyrazole-; 1H-Pyrazole-4-carboxamide,3-amino