[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a sphingoid obtained by formal oxidation of the 3-hydroxy group of C20 sphinganine. It is functionally related to a C20 sphinganine. It is a conjugate base of a C20 3-dehydrosphinganine(1+)."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][N]"}]