[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][C@H1][Branch1][C][C][N]"}, {"from": "gpt", "value": "The molecule is a sphingoid consisting of 3-dehydrosphinganine in which the terminal hydroxy group is replaced by a hydrogen. It is functionally related to a 3-dehydrosphinganine. It is a conjugate base of a 1-deoxy-3-dehydrosphinganine(1+)."}]