Using CCc1ncnc(NCC(C)Oc2ccc(C)cc2C)c1Br, O=C(OCCl)c1ccccc1 to produce CCc1c(Br)c(NCC(C)Oc2ccc(C)cc2C)nc[n+]1COC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.