[13C]-Pyridoxine
[13C]-Pyridoxine
[13C, 2H3]-Metribuzin
[13C6]-N-Butylbenzenesulfonamide
[2H5]-Hydroxyitraconazole
[13C3, 15N]-6-Thioguanine
[2H10]-Pitofenone
[2H3]-Valdecoxib
[13C,2H3]-Enzastaurin
[13C4]-Azelaic acid
[13C4, 15N2]-Brivudine
[13C6]-Tienilic acid
[2H6]-Carbinoxamine maleate