Using O, Oc1ncnc2c(-c3ccccc3C3(c4ccccc4)OCCO3)cnn12 to produce O=C(c1ccccc1)c1ccc(-c2cnn3c(O)ncnc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.