[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a member of the class of cyclopentanes that is cyclopentane substituted by a cyclopentylidene group at position 1. It is a ring assembly and a member of cyclopentanes."}, {"from": "gpt", "value": "[C][C][C][C][=Branch1][Branch2][=C][C][C][C][C][Ring1][Branch1][C][Ring1][#Branch2]"}]