Using Cn1nc(-c2cc(C=O)c(Cl)cc2F)c(Cl)c1C(F)(F)F, OCCO to produce Cn1nc(-c2cc(C3OCCO3)c(Cl)cc2F)c(Cl)c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.