6-Hydroxy-N-acetyl-1-aminopyrene (OHNAAP) is a metabolite of 1-Nitropyrene (1-NP) , which is one of the most abundant nitrated polycyclic arom. hydrocarbons (NPAHs) in diesel exhaust particulate matter (DEP) and is a main contributor of direct-acting mutagenicity in DEP. 6-Hydroxy-N-acetyl-1-aminopyrene can be used as a marker to measure exposure to DEP.
