Using Nc1ncnc2c1c(-c1cccc(OCc3ccccc3)c1)cn2-c1cccc(OCCn2ccnc2)c1 to produce Nc1ncnc2c1c(-c1cccc(O)c1)cn2-c1cccc(OCCn2ccnc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.