[{"from": "human", "value": "Describe this molecule. [C][C@H1][Branch2][Ring2][Ring1][C@@H1][Branch2][Ring1][Ring1][C@H1][Branch1][Branch1][C][Ring1][Branch1][=O][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][/C][=C][/C@H1][Branch1][#Branch1][C][C][C][C][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of 20-hydroxyprostaglandin E1, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is functionally related to a prostaglandin E1(1-). It is a conjugate base of a 20-hydroxyprostaglandin E1."}]