Using O=Cc1ccc(-c2ccccc2CNC(=O)OCC2c3ccccc3-c3ccccc32)cc1, COC(OC)OC to produce COC(OC)c1ccc(-c2ccccc2CNC(=O)OCC2c3ccccc3-c3ccccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.