Cefprozil for peak identification

Torasemide impurity E - ethyl [[4-[(3-methylphenyl)amino]pyridin-3-yl]sulfonyl]carbamate

Etoposide for peak identification

Gentamicin for peak identification

Nicergoline for peak identification

Amphotericin B for microbiological assay

Betaxolol for peak identification

Prednisolone for peak identification

Glycopyrronium impurity N - (3RS)-3-[(2RS)-(2-cyclopentyl-2-hydroxy-2-phenylacetyl)oxy]-1,1-dimethylpyrrolidinium

Butyl parahydroxybenzoate impurity E - 2-methylpropyl 4-hydroxybenzoate (iso-butyl parahydroxybenzoate)