Using C#Cc1cc(OCc2c(F)cccc2F)c2nc(C)c(C(=O)OCC)n2c1 to produce C#Cc1cc(OCc2c(F)cccc2F)c2nc(C)c(C(=O)O)n2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.