Using COc1nccc(-c2cnn(-c3ccc(C(=O)NCC4CCOCC4)cn3)c2OC)c1OC to produce COc1nccc(-c2cnn(-c3ccc(C(=O)NCC4CCOCC4)cn3)c2O)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.