Using OCc1ccccc1, CCOC(=O)CC1CCC(C(=O)O)CC1 to produce CCOC(=O)C[C@H]1CC[C@H](C(=O)OCc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.