1-Octen-3-ol,neat,neat,1mL,

3,3´-Dimethoxybenzidine, certified, 0.1g

Metformin, 1000μg/ml in MeOH, 1ml

Mono-n-butyl phthalate (ring-1,2-13C2, dicarboxyl-13C2, 99%) 100 µg/mL in MTBE, 1,2ml