1-Keto-3-methylcholanthrene 15-Keto-20-methylcholanthrene 20-Methylcholanthren-15-one 3-07-00-02870 (Beilstein Handbook Reference) 3-Methylcholanthren-1-one 3-Methylcholanthrene-1-one 3343-07-5 BRN 2287527 Benz(j)aceanthrylen-1(2H)-one, 3-methyl- CCRIS 1128 CHOLANTHREN-1-ONE, 3-METHYL-