Trimethoprim, certified, 0.25g

n-Eicosane, ?13C: -33.06, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 112-95-8

Gadolinium (Gd)

Benzo[g]chrysene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 196-78-1