Metformin-d6-HCl, 100μg/ml in MeOH, 5ml

N-Methyl-N-(trimethylsilyl)trifluoroacetamide,neat,neat,1mL,

4-Chloroaniline, 100 µg/ml, Acetonitrile, 5ml

Roxithromycin-d7, 1mg