Using CCOC(=O)c1cc2cc(O)ccc2[nH]1, O=C(CBr)N1CCCC1 to produce CCOC(=O)c1cc2cc(OCC(=O)N3CCCC3)ccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.