1-Butanamine, N-ethyl-N-nitroso- (9CI) 4549-44-4 Aethyl-N-butyl-nitrosoamin [German] BRN 2204437 Butanamine, N-ethyl-N-nitroso- Butylamine, N-ethyl-N-nitroso- Butylethylnitrosamin [Czech] CCRIS 301 Ethyl-N-butylnitrosamine N-Butyl-N-ethylnitrosamine N-Ethyl-N-butylnitrosamine N-Ethyl-N-nitrosobutylamine N-NITROSO-ETHYL-N-BUTYLAMINE N-Nitroso-N-butylethylamine N-Nitrosoethyl-N-butylamine NSC 135 Nitrosoethylbutylamine