11,12-Epoxy-3-methylcholanthrene 3-Methylcholanthrene-11,12-epoxide 67195-51-1 Benz(7,8)aceanthryleno(9,10-b)oxirene, 1a,11c-dihydro-9-methyl- Benz(7,8)aceanthryleno(9,10-b)oxirene, 3-methyl- Cholanthrene, 3-methyl-11,12-epoxy- MCA-11,12-epoxide MCA-11,12-oxide