[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an acetylenic compound, an acetate ester and a member of 2,2'-bithiophenes."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C][C][Branch2][Ring1][Ring1][C][#C][C][=C][C][=C][Branch1][Ring2][S][Ring1][Branch1][C][=C][C][=C][S][Ring1][Branch1][O][C][=Branch1][C][=O][C]"}]