[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a sphingoid which is the 1-deoxymethylated derivative of 3-dehydrosphinganine. It is functionally related to a 3-dehydrosphinganine. It is a conjugate base of a 1-deoxymethyl-3-dehydrosphinganine(1+)."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][C][N]"}]