163887-61-4 2,11-Dichlorobenzo(rst)phenanthro(10,1,2-cde)pentaphene-9,18-dione 65122-11-4 Benzo(rst)phenanthro(10,1,2-cde)pentaphene-9,18-dione, 2,11-dichloro- EINECS 265-480-8 Isoviolanthrone, 2,11-dichloro-