[{"from": "human", "value": "Describe this molecule. [C][C][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 that is C20 sphinganine bearing an additional 4R-hydroxy substituent. It is functionally related to a C20 sphinganine. It is a conjugate base of a C20 phytosphingosine(1+)."}]