Using O=C1CCC(=O)N1Br, OCc1cc(CCCCCOc2c(Cl)cc(C3=NCCO3)cc2Cl)on1 to produce Clc1cc(C2=NCCO2)cc(Cl)c1OCCCCCc1cc(CBr)no1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.