39097-15-9 6,7,8,9-Tetrahydro-11-thiabenzo[b]fluorene 7,8,9,10-Tetrahydrobenzo[b]naphtho[2,3-d]thiophene 7,8,9,10-Tetrahydronaphtho[2,3-b]benzothiophene Benzo[b]naphtho[2,3-d]thiophene, 7,8,9,10-tetrahydro- NSC33397