Using O=C(NCC1CCC(F)(F)CC1)c1c(Cl)ccc2nc(Cl)ccc12, COCCO to produce COCCOc1ccc2c(C(=O)NCC3CCC(F)(F)CC3)c(Cl)ccc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.