Internal Standard

2-Methyl-2-(nitroamino)-1-propanol, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 123666-60-4

Dibromoacetic acid, 100 µg/ml, Acetonitrile, 1ml

17 alpha(H),21 alpha(H)-30-Nor-29-methylhopane, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.