10478-42-9 3-(Methylnitrosamino)propionic acid 3-(Methylnitrosoamino)propionic acid 3-(N-Nitroso-N-methylamino)propionic acid CCRIS 3920 N-Methyl-N-nitroso-beta-alanine Propanoic acid, 3-(methylnitrosamino)- beta-Alanine, N-methyl-N-nitroso-