Using CCOC(=O)CC(Cc1ccc2c(c1)OCC(=O)N2Cc1ccc(OC)cc1)c1ccccc1 to produce CCOC(=O)CC(Cc1ccc2c(c1)OCC(=O)N2)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.