1,2,6,7-四氯二苯并呋喃

1,2,7,9-四氯二苯并呋喃

1,3,4,9-四氯二苯并呋喃

1,4,7,8-四氯二苯并呋喃

2,3,4,6-Tetrachlorodibenzo[b,d]fur