Using CCCCCn1cc(C(=O)c2cccc3ccccc23)c2cc(O)ccc21, CC(C)(C)OC(=O)CBr to produce CCCCCn1cc(C(=O)c2cccc3ccccc23)c2cc(OCC(=O)OC(C)(C)C)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.