Metformin hydrochloride, 100 µg/ml, Methanol, 1m

2-Hydroxy-4-methoxybenzophenone-2',3',4',5',6'-d5,neat,neat,25mg,

Roxithromycin-d7, 1mg

Tris(2-ethylhexyl) phosphate, 1.2ml x 50ug/ml, toluene