API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Pyrrolidone

Pyrrolidin-2-one

Pyrrolidone
Pyrrolidone

EP Impurity A

butane-1,4-diol PyrrolidoneEP-Impurity-A
Pyrrolidone

EP Impurity C

1-methylpyrrolidin-2-one (N-methylpyrrolidone) PyrrolidoneEP-Impurity-C