Using COCCl, CCOC(=O)c1[nH]c2c(Br)cccc2c1CCCOc1cccc2ccccc12 to produce CCOC(=O)c1c(CCCOc2cccc3ccccc23)c2cccc(Br)c2n1COC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.