32362-68-8 33944-31-9 4,9-Dimethyl-2,3-benzthiophanthrene 4-17-00-00726 (Beilstein Handbook Reference) 6,11-Dimethylbenzo(b)naphtho(2,3-d)thiophene BENZO(b)NAPHTHO(2,3-d)THIOPHENE, 6,11-DIMETHYL- BRN 0205644