[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C@H1][Branch1][#C][C@H1][Branch1][O][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1][NH3+1][O]"}, {"from": "gpt", "value": "The molecule is an anionic phospholipid that is the conjugate base of 15-methylhexadecasphing-4-enine, having an anionic phosphate group and a protonated amino group; major species at pH 7.3. It is a conjugate base of a 15-methylhexadecasphing-4-enine 1-phosphate."}]