Synonyms: Cholanthrene,11,12-epoxy-11,12-dihydro-3-methyl- (7CI,8CI); 11,12-Epoxy-11,12-dihydro-3-methylcholanthrene;11,12-Epoxy-3-methylcholanthrene; 3-Methylcholanthrene 11,12-oxide;3-Methylcholanthrene-11,12-dihydro-11,12-oxide;3-Methylcholanthrene-11,12-epoxide