API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Metformin

EP Impurity D

1,3,5-triazine-2,4,6-triamine Metformin-EP-Impurity-D
Metformin

EP Impurity A

Cyanoguanidine Metformin-EP-Impurity-A
Metformin

EP Impurity F

N-methylmethanamine Metformin-EP-Impurity-F
Metformin

EP Impurity E

1-methylbiguanide Metformin-EP-Impurity-E