Using CCOC(=O)CBr, CCOC(=O)N1CCN(C(=O)[C@H](CCO)NC(=O)c2cc(OC3CCCC3)nc(-c3ccccc3)n2)CC1 to produce CCOC(=O)COCC[C@H](NC(=O)c1cc(OC2CCCC2)nc(-c2ccccc2)n1)C(=O)N1CCN(C(=O)OCC)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.