for the following products
4,5,6,7-Tetrahydro-4-benzothiophenone | 4-Keto-4,5,6,7-tetrahydrothianaphthalene | 4-Oxotetrahydrobenzo[b]thiophene | 6,7-Dihydro-1-benzothiophen-4(5H)-one | 6,7-Dihydrobenzo[b]thiophen-4-one and 6,7-Dihydro-4-benzo[b]thiophenone
