Verapamil-d6, 1mg

iso-Propyl 4-hydroxybenzoate-2,3,5,6-d4, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 1219798-72-7

Carbamazepine-10,11-epoxide-d10

O-Desmethyl tramadol hydrochloride , 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no.