[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a vitamin D derivative that is produced by the conversion of calcifediol by 1,25-dihydroxyvitamin D3 24-hydroxylase (CYP24A1). 24,25-dihydroxycholecalciferol is a marker for calcifediol catabolism because it is the major metabolite of calcifediol, and its urine levels are increased in certain diseases, such as chronic kidney disease (CKD)."}, {"from": "gpt", "value": "[C][C@H1][Branch1][#C][C][C][C][Branch1][=Branch2][C][Branch1][C][C][Branch1][C][C][O][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][#Branch1][C][C][C][/-Ring1][=Branch1][=C][O][C]"}]