Using O=C1CCC(=O)O1, CCOC(=O)C[C@H](N)Cc1ccc(-c2cc(Cl)ccc2F)cc1 to produce CCOC(=O)C[C@@H](Cc1ccc(-c2cc(Cl)ccc2F)cc1)NC(=O)CCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.