Using CCOC(=O)N1CCN(C(=O)C(CCC(=O)O)NC(=O)c2cc(OC)c3ccccc3n2)CC1, CC(C)(C)OC(=O)CN to produce CCOC(=O)N1CCN(C(=O)C(CCC(=O)NCC(=O)OC(C)(C)C)NC(=O)c2cc(OC)c3ccccc3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.