1,12-dimethylbenz[a]anthracene.ct -1 dibenzo[a,j]naphthacene.ct -1 dibenzo[a,l]pyrene.ct 1 benzo[c]phenanthrene.ct 1 5-methylchrysene.ct 1 6-methylchrysene.ct 1 3-methylbenzo[c]phenanthrene.ct 1 1-methylchrysene.ct 1 11-methylbenz[a]anthracene.ct 1