Using O=C1N(CCCO)c2ccccc2C12COc1cc3c(cc12)OCO3 to produce O=CCCN1C(=O)C2(COc3cc4c(cc32)OCO4)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.