API |
IMPURITY |
CHEMICAL NAME |
STRUCTURE |
Allopurinol |
EP Impurity F |
Hydrazine |  |
Allopurinol |
Allopurinol Related Compound A |
3-Amino-4-carboxamidopyrazole Hemisulfate | |
Allopurinol |
Allopurinol Related Compound B |
5-(formylamino)-1H-pyrazole-4-carboxamide |  |
Allopurinol |
Allopurinol Related Compound D |
ethyl 5-amino-1H-pyrazole-4-carboxylate |  |
Allopurinol |
Allopurinol Related Compound C |
5-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-4-carboxamide |  |
Allopurinol |
Allopurinol Related Compound E |
ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate |  |
Allopurinol |
Allopurinol Related Compound F |
(ethyl-(E/Z)-3-(2-carbethoxy-2-cyanoethenyl)amino-1H-pyrazole-4-carboxylate) |  |