N-nitrosoamides - a horse of a different color

As there is a probability of forming following 2 NDSRI impurities (Nitrosamine A & B) of Flecainide in its formulation due to presence of Nitrite/Nitrate in the excipients used, can anyone guide whether following Dinitrosamine NDSRI impurity (Nitrosamine C) can be formed in formulation.
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