2,2,4-Trimethylpentane, 5ml

Metronidazole, certified, 0.25g

n-Hexyl 4-hydroxybenzoate-2,3,5,6-d4, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. NA 1083-27-8 for unlabelled

25-Hydroxyvitamin D3-d6 (Dimethyl 26,27-d6), 50µg/ml in MeOH, 1ml