[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][C][C][C][C][C][/C][=C][/C][C][C][C@H1][Branch1][O][C@H1][Branch1][#Branch1][C@H1][Branch1][Ring1][C][O][N][O][O]"}, {"from": "gpt", "value": "The molecule is a sphingoid consisting of (8E)-sphing-8-enine bearing an additional (R)-hydroxy substituent at the 4-position. It is functionally related to a sphing-8-enine. It is a conjugate acid of a 4-hydroxysphing-8-enine(1+)."}]