[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][C][C@H1][Branch1][O][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1][O][C][=Branch1][C][=O][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C]"}, {"from": "gpt", "value": "The molecule is a 1-acyl-2-octadecanoyl-sn-glycerol-3-phosphate(2-) in which the 1-acyl group is also octadecanoyl; major species at pH 7.3. It is a conjugate base of a 1,2-dioctadecanoyl-sn-glycerol-3-phosphate."}]