to determine the structures of the dna adducts of two cyclic nitrosamines , n-nitrosopyrrolidine and n-nitrosomorpholine , the model compounds , alpha-acetoxy-n-nitrosopyrrolidine , 4- ( carbethoxynitrosamino ) butanal and 2- ( carbethoxynitrosamino ) ethoxyacetaldehyde , were allowed to react with deoxyguanosine in the presence of porcine liver esterase or base .
C0028197
nitrosamines
C0027253
n-nitrosopyrrolidine