title: Identification of metabolites of benzo[b]fluoranthene.
abstract: The metabolism by rat liver 9000 x g supernatant of the environmental carcinogen benzo[b]fluoranthene was investigated. The major metabolites were identified, by comparison to synthetic samples, as 5- and 6-hydroxybenzo[b]fluoranthene and 4- and 7-hydroxybenzo[b]fluoranthene. The principal dihydrodiol metabolite formed under these conditions was trans-11,12-dihydro-11,12-dihydroxybenzo[b]fluoranthene, which was identified by comparison to the synthetic compound. 1,2-Dihydro-1,2-dihydroxybenzo[b]fluoranthene was identified, by its mass spectrum and by comparison if its u.v. spectrum to that of a synthetic model compound, 11-ethylidene-11H-benzo[b]fluorene. No evidence was obtained for the formation of 7b,8-dihydro-7,8-dihydroxybenzo[b]fluoranthene or trans-9,10-dihydro-9,10-dihydroxybenzo[b]fluoranthene. The latter would be the precursor to a bay region dihydrodiol epoxide of benzo[b]fluoranthene.
mesh_terms: D000818:Animals; D002273:Carcinogens; D002851:Chromatography, High Pressure Liquid; D004781:Environmental Exposure; D005449:Fluorenes / Q000378:metabolism*; D066298:In Vitro Techniques; D008099:Liver / Q000378:metabolism*; D008297:Male; D013058:Mass Spectrometry; D051381:Rats; D011916:Rats, Inbred F344; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002273:Carcinogens; D005449:Fluorenes; C006703:benzo(b)fluoranthene