1,2-Dichlorobenzo(b)thiophene 2,3-Dichlorobenzo(b)thiophene 2,3-Dichlorothianaphthene 2,3-Dichlorothionaphthene 5-17-02-00009 (Beilstein Handbook Reference) 5323-97-7 AI3-18361 BRN 0128228 Benzo(b)thiophene, 2,3-dichloro- (8CI,9CI) NSC 2838 Thianaphthene, 2,3-dichloro-