Method 1640Mix A

Propoxycarbazone sodium, 100 μg/ml in MeOH, 1ml

Isocaffeine (1,3,9-Trimethylxanthine), neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 519-32-4

Zolpidem tartrate, 100 µg/ml, Methanol, 1ml