Using Clc1ccc(C2CCN(CCC=C3Cc4cc(Br)ccc4Oc4ncccc43)CC2)cc1, O=C=O to produce O=C(O)c1ccc2c(c1)CC(=CCCN1CCC(c3ccc(Cl)cc3)CC1)c1cccnc1O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.