Synonyms: Benz[3,4]anthra[1,2-b]oxirene,1a,11b-dihydro-11-methyl- (9CI); Benz[a]anthracene, 5,6-epoxy-5,6-dihydro-7-methyl-(7CI,8CI); 5,6-Epoxy-5,6-dihydro-7-methylbenz[a]anthracene;7-Methylbenz[a]anthracene 5,6-epoxide; 7-Methylbenz[a]anthracene 5,6-oxide