The following papers related to use of 2-acetyl aminofluorene may be helpful
1.ELIZABETH C. MILLER, JAMES A. MILLER, and HENRIK A. HARTMANN. 1961. N-Hydroxy-2-acetylaminofluorene" A metabolite of 2-Acetylaminofluorene with Increased Carcinogenic Activity in the Rat. Cancer Research Volume 21: 815-833. http://cancerres.aacrjournals.org/content/21/6/815
2.GARY M. WILLIAMS, MICHAEL J. IATROPOULOS, AND ALAN M. JEFFREY. 2004. Thresholds for the Effects of 2-Acetylaminofluorene in Rat Liver. Toxicologic Pathology, 32 (Suppl. 2):85–91. http://tpx.sagepub.com/content/32/2_suppl/85.full.pdf