[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a C20 dihydroceramide in which the ceramide N-acyl group is specified as tricontanoyl."}, {"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][C][C][C][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C@@H1][Branch2][Ring1][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][O]"}]