4-Methoxy-7,12-dimethylbenz(a)anthracene , its CAS NO. is 16277-49-9, the synonyms are 4-Methoxy-dmba ; Benz(a)anthracene, 4-methoxy-7,12-dimethyl- ; Benz(a)anthracene, 7,12-dimethyl-4-methoxy- .