Using CC(C)(C)OC(=O)NCCBr, COc1cccc(-c2[nH]c(=O)c3ccccc3c2O)c1 to produce COc1cccc(-c2[nH]c(=O)c3ccccc3c2OCCNC(=O)OC(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.