U-{13C17}-Griseofulvine

Methanol QC Reference Mixture III n-Butyl sulfide, 0.5 ppm (weight S by weight) in 99.9 % methanol; units: 1x10mL, 5x10mL

Timolol Maleate

1,2,3,8,9-Pentachloro(13C12)dibenzofuran, 1.2mL x 50ug/mL, toluene