Using COC(=O)c1cn(C(=O)OC(C)(C)C)c2nccc(C=O)c12, CC(C)[C@@H](N)C(=O)NC1CCCC1 to produce COC(=O)c1cn(C(=O)OC(C)(C)C)c2nccc(CN[C@@H](C(=O)NC3CCCC3)C(C)C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.