Using O=C(Nc1ccc(OC(F)(F)F)cc1)c1cccc(-c2cnc(Cl)nc2)c1, OCCO to produce O=C(Nc1ccc(OC(F)(F)F)cc1)c1cccc(-c2cnc(OCCO)nc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.