2,3,5-Tribromophenol, 1.2ml x 100ug/ml, toluene

Trimethoprim, neat, Solvent-neat, Unit 100mg, # of units-, Cas.no. 738-70-5

Internal Standard Solution, 1.2ml, toluene

Naphthalene-d8, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-10, Cas.no. 1146-65-2