User: I want to know more about the compound with SMILES CCOC(=O)[C@H](C)N[P@](=O)(CO[C@@H]1C=C(F)[C@H](n2cnc3c(N)ncnc32)O1)Oc1ccccc1.
Assistant: Interesting, how can I help?
User: What is the definition of this compound's USAN stem?
Assistant: antivirals
User: I want to know more 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#}
CCOC(=O)[C@H](C)N[P@](=O)(CO[C@@H]1C=C(F)[C@H](n2cnc3c(N)ncnc32)O1)Oc1ccccc1
CCOC(=O)[C@H](C)N[P@](=O)(CO[C@@H]1C=C(F)[C@H](n2cnc3c(N)ncnc32)O1)Oc1ccccc1
ethyl (2S)-2-[[[(2R,5R)-5-(6-aminopurin-9-yl)-4-fluoro-2,5-dihydrofuran-2-yl]oxymethyl-phenoxyphosphoryl]amino]propanoate
What is the definition of this compound's USAN stem?