Derivatives of benzo[5,6]cyclohepta[1,2‐b]thiophene. Synthesis of 2,3,7,8‐tetrahydro‐3‐oxothieno[1,2‐b]cyclohepta[5,6,7‐de]isoquinoline and 1,2,3,7,8,11b‐hexahydro‐3‐oxothieno[1,2‐b]cyclohepta[5,6,7‐de]isoquinoline | Publicación