Using CCOC(=O)CN, O=C(O)[C@H](CCCCO)N1C(=O)c2ccccc2C1=O to produce CCCC[C@@H](C(=O)NCC(=O)OCC)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.