Rifaximin-d6 (Major), 1mg

1,2,7,8-Tetrachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

3,3'-Difluorodiphenyl ether, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1800-48-2

Tris(2-chloroethyl) phosphate-d12, 1.2ml x 50ug/ml, toluene