Task: Please answer the following question about the molecule with SMILES CCOC(=O)[C@H](C)N[P@](=O)(CO[C@@H]1C=C(F)[C@H](n2cnc3c(N)ncnc32)O1)Oc1ccccc1.
Description: What is the definition of this compound's USAN stem?
Completion: antivirals
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {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?