The nitrated N-heterocyclic aromatic hydrocarbons (NAHs) are found in a variety of environmental sources; many of them have been determined to be mutagenic in short-term assays and/or carcinogenic in animal tests. In this laboratory, we synthesized and characterized nitrated 7 H-dibenzo [c, g] carbazole (DBC) and the nitrophenolic metabolites of DBC as potential mutagenic and carcinogenic xenobiotics. The nitro group was formed ...