Metolcarb, 100 µg/ml, Acetonitrile, 5ml

DL-N-Nitrosonornicotine-d4, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 66148-19-4

Caffeine, 100 µg/ml, Methanol, 1ml

Nitrofurantoin 13C3, 5mg