9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one; 9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one (90%); 9,10-Dihydro-4H-benzo[4,5]cyclohepta[b]-thiophen-4-one;