6 ms·B[a]P: Benzo[a]pyrene NNK: 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone NNN: N-Nitrosonicotineby xaedes 9y agoB[a]P: Benzo[a]pyrene NNK: 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone NNN: N-Nitrosonicotine