Using Cn1nc(-n2ncc(C#N)c2C=O)c(Cl)c1OC(F)F, OCCO to produce Cn1nc(-n2ncc(C#N)c2C2OCCO2)c(Cl)c1OC(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.