Oxypurinol, 100µg/mL in Water, 1ml

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol

2-Methylnaphthalene, 10.0 µg/ml, Acetonitrile, 1

Dibenzo(a,h)anthracene, 100µg/ml in Acetonitrile, 1ml