Using OCCc1c(CO)cc2ccc3c(c2c1-c1ccc2c(c1)OCO2)OCO3 to produce O=C1OCCC23C(=CC=CC12)C1=C(C=C3c2ccc3c(c2)OCO3)OCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.