Ibuprofen, 100μg/ml in MeOH, 1ml

Irbesartan-d4 (2,3,5,6-phenyl-d4),ca. 100 µg/mL,MeOH,1mL,

2,4-D 13C6, 100µg/ml in Acetone, 1ml

2,4,6-Trimethylphenol, 250mg