Using COC(=O)C(Cc1ccc2c(c1)OCO2)=C(c1ccccc1)c1ccccc1 to produce O=C(O)C(Cc1ccc2c(c1)OCO2)=C(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.