Using CC(C)(C)OC(=O)N[C@H]1CCCCNC1=O, C=CC(=O)OC to produce COC(=O)CCN1CCCC[C@H](NC(=O)OC(C)(C)C)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.