Dehydrocholic Acid, 25g

N-Nitrosodiethylamine, 100 µg/ml, Methanol, 5ml

N-Ethyl-n-perfluorobutanesulfonamide (N-EtFBSA), 50μg/ml in Acetonitrile, 1ml

N-Nitrosodiisopropylamine, 1000µg/mL in MeChl, 1ml