[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a cycloalkene consisting of cyclopentene having a methyl group at the 1-position and gem-dimethyl groups at the 5-position. It derives from a hydride of a cyclopentene."}, {"from": "gpt", "value": "[C][C][=C][C][C][C][Ring1][Branch1][Branch1][C][C][C]"}]