[Ring-13C6]-2,4-Dichlorophenoxyacetic acid
                          [Ring-13C6]-2,4-Dichlorophenoxyacetic acid
                          [13C,15N2]-2',2'-Difluorodeoxyuridine
                          [13C6]-Tamoxifen
                          [13C6,2H2]-Raltegravir
                          [13C,2H4]-Dihydroartemisinin
                          [13C7]-L-3,4-Dihydroxyphenylserine hydrochloride
                          [2H5]-Posaconazole
                          [2H5]-Cromolyn disodium salt
                          [2H5]-Itraconazole
                          [2H6]-Pantoprazole sodium salt
                          [13C,2H3]-3-O-Methyl-L-DOPA
                          [2H4]-2-Oxo-clopidogrel