Roxithromycin, certified, 0.1g

Ibuprofen Acyl-ß-D-glucuronide (mixture of diastereomers), 1mg

4-Formylaminoantipyrine, 100µg/mL in Acetonitrile, 1ml

Memantine HCl, 1000µg/ml in MeOH, 1ml