[{"from": "human", "value": "Describe this molecule. [C][C@H1][C][=Branch1][C][=O][C@H1][Branch2][Branch1][S][C@@H1][Branch2][Branch1][O][C@H1][Branch1][Ring2][O][Ring1][#Branch1][O][P][=Branch1][C][=O][Branch1][C][O][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@@H1][C@H1][Branch2][Ring1][=N][C@H1][Branch2][Ring1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][Branch1][N][C][=N][C][=C][Ring1][Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][N][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a GDP-4-dehydro-L-fucose in which the anomeric centre of the fucose portion has beta-configuration. An intermediate formed during the de novo synthesis of GDP-L-fucose. It has a role as a mammalian metabolite."}]