[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][Branch2][Ring1][N][/C][=C][/C@H1][C@H1][Branch2][Ring1][Ring2][C][C][Branch1][#C][C][Ring1][Branch1][C][/C][=C][\\C][C][C][C][=Branch1][C][=O][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a form of prostaglandin F2alpha derived from prostaglandin D2 (PGD2). The concentration of 9alpha,11beta-prostaglandin F2alpha (9a11b-PGF2a) in a sample may be correlated with the levels of PGD2 synthesis. 9a11b-PGF2a levels are elevated in certain types of cancers."}]