Erythromycin C,neat,neat,10mg,

Acetylsalicylic acid-d4 (ring-d4),100 µg/mL,MeOH,1mL,

N-Ethyl-N-(2-hydroxyethyl)perfluorooctylsulfonamid

Simazine (ring-13C3), 100ug/ml in MeOH, 1,2ml