rac 4-Hydroxy Ephedrine Hydrochloride, 10mg

1,2,3,5-Tetrachloro[13C6]benzene, 1.2ml x 100ug/ml, isooctane

Ethanol standard in serum,0.2g/L,serum, 1.5mL

Sildenafil citrate,100 µg base/mL,MeOH,1mL