Using COCOc1ccc(-c2nc3cc(OC)cc(OC)c3c(=O)[nH]2)cc1CCO to produce COc1cc(OC)c2c(=O)[nH]c(-c3ccc(O)c(CCO)c3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.