Using CCC(CC)(CO)CO, CC(C)[C@H](NC(=O)OCc1ccccc1)C(=O)O to produce CCC(CC)(CO)COC(=O)[C@@H](NC(=O)OCc1ccccc1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.