1,2-Dehydro-3-methylcholanthrene 20-Methylcholanthrylene 3-Methylbenz(j)aceanthrylene 3-Methylcholanthrylene 3343-10-0 BENZ(j)ACEANTHRYLENE, 3-METHYL- BRN 2270883 CCRIS 2479 Dehydro-3-methylcholanthrene NSC 400562