Levamisole for system suitability

Levamisole hydrochloride

Levetiracetam

Levetiracetam impurity A - (2RS)-2-(2-oxopyrrolidin-1-yl)butanoic acid

Levetiracetam impurity B - (2Z)-2-(2-oxopyrrolidin-1-yl)but-2-enamide

Levetiracetam impurity C - pyridin-2-ol

Levetiracetam impurity D - (2R)-2-(2-oxopyrrolidin-1-yl)butanamide ((R)-etiracetam)

Levocabastine hydrochloride

Levocarnitine

Levocarnitine impurity A - (E)-or(Z)-4-(trimethylammonio)but-2-enoate