Venlafaxine for system suitability

Venlafaxine hydrochloride

Verapamil hydrochloride

Verapamil impurity I - (2RS)-2-(3,4-dimethoxyphenyl)-2-[2-[[2-(3,4)dimethoxyphenyl)- ethyl](methyl)amino]ethyl]3-methylbutanenitrile

Verapamil impurity M - 5,5'-[[2-(3,4)dimethoxyphenyl)ethyl]imino]bis[2-(3,4-dimethoxyphenyl)- 2-(1-methylethyl)pentanenitrile

Verbenalin

Vigabatrin

Vigabatrin impurity A - (5RS)-5-ethenylpyrrolidin-2-one

Vigabatrin impurity B - (2E)-2-(2-aminoethyl)but-2-enoic acid

Vigabatrin impurity D - 4-aminobutanoic acid