Using CCOC(C)=O, Clc1ccc(C2CCc3cc(Br)cnc3O2)cc1Cl to produce Oc1cnc2c(c1)CCC(c1ccc(Cl)c(Cl)c1)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.