[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a synthetic vitamin D analog. Paricalcitol has been used to reduce parathyroid hormone levels. Paricalcitol is indicated for the prevention and treatment of secondary hyperparathyroidism associated with chronic renal failure."}, {"from": "gpt", "value": "[C][C@H1][Branch1][#C][/C][=C][/C@H1][Branch1][C][C][C][Branch1][C][C][Branch1][C][C][O][C@H1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][#Branch1][C][C][C][/C][\\-Ring1][=Branch1][=C][\\C][=C][C][C@H1][Branch1][=Branch2][C][C@@H1][Branch1][Ring2][C][Ring1][=Branch1][O][O][C]"}]