[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a vitamin D(3) analogue which has not caused hypercalcaemia or significant irritation in preclinical trials."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][C][C][C@H1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][#Branch2][C][C][C][/C][\\-Ring1][=Branch1][=C][\\C][=C][C][C@H1][Branch1][N][C][=Branch1][C][=C][C@@H1][Branch1][Ring2][C][Ring1][#Branch1][O][O][C]"}]