User: I have a question about the molecule with SMILES CCCc1cc(=O)[nH]c(=S)[nH]1.
Assistant: That sounds interesting, how can I help?
User: What is the definition of this compound's USAN stem?
Assistant: The answer is uracil type antineoplastics; uracil derivatives used as thyroid antagonists and as antineoplastics
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#}
CCCc1cc(=O)[nH]c(=S)[nH]1
CCCc1cc(=O)[nH]c(=S)[nH]1
6-propyl-2-sulfanylidene-1H-pyrimidin-4-one
What is the definition of this compound's USAN stem?