[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule has been available for human use since 1977. It was initially studied for use as antidepressant given its structural similarity to tricyclic antidepressants - it differs from [Amitriptyline] by only a single double bond. Since its approval, it has remained relatively popular as an adjunctive, short-term treatment for acute skeletal muscle spasms secondary to musculoskeletal injury."}, {"from": "gpt", "value": "[C][N][Branch1][C][C][C][C][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][#C]"}]