User: I have a question about the molecule with SMILES Nc1nc2c(ncn2COCCO)c(=O)[nH]1.
Assistant: Interesting, how can I help?
User: What is the definition of this compound's USAN stem?
Assistant: antivirals: antivirals (acyclovir type)
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#}
Nc1nc2c(ncn2COCCO)c(=O)[nH]1
Nc1nc2c(ncn2COCCO)c(=O)[nH]1
2-amino-9-(2-hydroxyethoxymethyl)-1H-purin-6-one
What is the definition of this compound's USAN stem?