N'-(3,4-Dichlorophenyl)-N,N-dimethylurea-13C6; DCMC-13C6; Hardener 95-13C6; Dairon-13C6; Direx-13C6; Dironet-13C6; Dironzol-13C6; Nortox-13C6; Duran-13C6; Dyhard UR 200-13C6; HRT Dinron-13C6; HW 920-13C6; Herbatox-13C6; Karmax-13C6; Karmex-13C6; Karmex D-13C6; Karmex DW-13C6; Karmex Diuron Herbicide-13C6; Lucenit-13C6; Marmer-13C6; Reventol A 6-13C6; Telvar Diuron Weed Killer-13C6