[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a sphingoid that is the C16 analogue of sphingosine. It has a role as a mouse metabolite. It is a sphingoid and an aminodiol. It is a conjugate base of a hexadecasphing-4-enine(1+)."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C@H1][Branch1][#Branch1][C@H1][Branch1][Ring1][C][O][N][O]"}]