Using COCCBr, O=C(CO)N1CCC[C@@H]1COc1cc(O)cc2ncnc(Nc3ccc(F)c(Cl)c3)c12 to produce COCCOc1cc(OC[C@H]2CCCN2C(=O)CO)c2c(Nc3ccc(F)c(Cl)c3)ncnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.