7,12-Dimethylbenzanthracene-7,12-endo-alpha,beta-succinic acid 7,14-Dimethyl-7,14-ethanodibenz(a,b)anthracene-15,16-dicarboxylic acid 7,14-Ethanodibenz(a,b)anthracene-15,16-dicarboxylic acid, 7,14-dimethyl- KJ4950000