[{"from": "human", "value": "Could you provide a description of this molecule? [C][C@@H1][C@H1][Branch2][Ring1][O][C@H1][Branch2][Ring1][=Branch1][C@@H1][Branch1][Ring2][O][Ring1][Branch1][N][C][=C][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][F][O][O]"}, {"from": "gpt", "value": "The molecule is a fluoropyrimidine derivative and oral prodrug of the antineoplastic agent 5-fluorouracil (5-FU) with antitumor activity. Doxifluridine, designed to circumvent the rapid degradation of 5-FU by dihydropyrimidine dehydrogenase in the gut wall, is converted into 5-FU in the presence of pyrimidine nucleoside phosphorylase. 5-FU interferes with DNA synthesis and subsequent cell division by reducing normal thymidine production and interferes with RNA transcription by competing with uridine triphosphate for incorporation into the RNA strand."}]