[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule are found largely in the medullated nerve fibers and may accumulate in metachromatic leukodystrophy."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C@H1][Branch2][Branch1][=N][C][=Branch1][C][=O][N][C@@H1][Branch2][Ring1][P][C][O][C@H1][C@@H1][Branch2][Ring1][=Branch2][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][C@@H1][Branch1][S][/C][=C][/C][C][C][C][C][C][C][C][C][C][C][C][C][O][O]"}]