independent of the concentration of inhaled nitrosamine , ranging from 1-450 micrograms/l in air , the relative amounts of exhaled substance 10 min after inhalation were 0.9 % n-nitrosodimethylamine , 0.4 % n-nitrosodiethylamine , 6 % n-nitrosopyrrolidine and 5 % n-nitrosomorpholine .
C0028197
nitrosamine
C0012431
nitrosodimethylamine