Metronidazole, certified, 0.25g

Diltiazem hydrochloride,1000 µg base/mL,MeOH,1mL,

Ethyl 3-(N-Butylacetamido)propanoate, 1g

Mono-n-octyl phthalate-3,4,5,6-d4, 100µg/ml in MeOH, 1ml