12c-Methyl-12cH-4,8,12-trioxadibenzo[c,d,mn]pyren- 6-yloxamic acid, ethyl ester Acetic acid, 2-[(12c-methyl-12cH-4,8,12-trioxadi-benzo[c,d,mn]pyren-6-yl)amino]-2-oxo-, ethyl ester NSC695177