subsequent analysis by gas chromatography for selected individual nitrosamines showed no evidence for the occurrence of methylethylnitrosamine ( men ) , diethylnitrosamine ( den ) , dipropylnitrosamine ( dpn ) , ethylbutylnitrosamine ( ebn ) , dibutylnitrosamine ( dbn ) , nor of n nitrosopiperidine ( n pipn ) , but traces of compounds having a similar retention time as dimethylnitrosamine ( dmn ) were observed .
C0028197
nitrosamines
C0012200
diethylnitrosamine