User: I have a question about the molecule with SMILES O=c1[nH]c(=O)n(C2CCCO2)cc1F.
Assistant: How can I help?
User: Please provide a description of this drug's mechanism of action.
Assistant: The answer is Thymidylate synthase inhibitor
User: I have a question about the {#molecule|chemical|compound!} with {SMILES__description} {SMILES#}.
Assistant: {#Sure, what is your question?|How can I help?|That sounds interesting, how can I help?|Interesting, how can I help?!}
User: {quest#}
Assistant: {#The answer is |!}{answ#}
O=c1[nH]c(=O)n(C2CCCO2)cc1F
O=c1[nH]c(=O)n(C2CCCO2)cc1F
5-fluoro-1-(oxolan-2-yl)pyrimidine-2,4-dione
Please provide a description of this drug's mechanism of action.