Using COc1ccc2c(c1)N(CCC(OC)OC)C(=O)CN2C(=O)OCc1ccccc1 to produce COc1ccc2c(c1)N(CCC(OC)OC)C(=O)CN2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.