AH-7921-d6 (dimethyl-d6)

d2 C29 alpha alpha alpha (20R)-Ethylcholestane, 100µg/mL in Isooctane, 1ml

p,p'-(13C12)Methoxychlor, 100µg/ml in Nonane, 1,2ml

Desphenyl Chloridazon-15N2, 1mg