38252-74-3 4-(Butylnitrosoamino)butanoic acid BCPN BRN 2257968 BUTYRIC ACID, 4-(N-BUTYL-N-NITROSAMINO)- Butanoic acid, 4-(butylnitrosoamino)- Butyl(3-carboxypropyl)nitrosamine CCRIS 835 N-Butyl-(3-carboxypropyl)nitrosamine N-Butyl-N-(3-carboxypropyl)nitrosamine N-Nitroso-N-butyl-N-(3-carboxypropyl)amine N-Nitrosobutylcarboxypropylamine