Folic acid, 250mg

1,2,3,4,5,6,8-Heptachloro(13C10)naphthalene, 1.2mL x 50ug/mL, nonane

Dalapon methyl ester

Perfluoro-n-[1,2-13C2]octanoic acid, 50µg/ml in MeOH, 1,2ml