Using O=C1Nc2cc3c(cc2C12COc1cc4c(cc12)CC(C(c1ccccc1)c1ccccc1)O4)OCCO3 to produce O=C1Nc2cc3c(cc2C12COc1cc4c(cc12)CCO4)OCCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.