[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. 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+)."}, {"from": "gpt", "value": "[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]"}]