[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][C][C][C@@H1][Branch2][Ring1][O][/C][=C][/C@@H1][C@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][C][Ring1][Branch1][=O][O][C][/C][=C][\\C][C][C][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "The molecule is an eicosanoid that is generated by the action of prostaglandin D2 synthase on prostaglandin H2. Prostaglandin D2 mediates vasodilation, smooth muscle contraction and circadian rhythms. This prostanoid may also play a role in male pattern baldness."}]