BHC (delta isomer-13C6), 100µg/ml in Nonane, 1,2ml

Tris(2-butoxy-[13C2]-ethyl) phosphate, 1.2ml x 50ug/ml, toluene

Prometryn, 100μg/mL in Acetonitrile, 1ml

Difloxacin hydrochloride,neat,neat,250mg,