9,9-Dichloro-Δ2,2(3H,3H)-binaphtho[2,3-b]thiophene-3,3-dione
CAS No. 6406-07-1
9,9-Dichloro-Δ2,2(3H,3H)-binaphtho[2,3-b]thiophene-3,3-dione;Algol Blue B;C.I.73420;Helindon Blue B