Using O=C(Nc1nc2cc(-c3cccc(C(F)(F)F)c3)ccc2[nH]1)c1cn2nc(Cl)ccc2n1, COCCO to produce COCCOc1ccc2nc(C(=O)Nc3nc4cc(-c5cccc(C(F)(F)F)c5)ccc4[nH]3)cn2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.