Using O=C(NC1N=C(c2ccccc2)c2ccccc2-n2cnnc21)OCc1ccccc1 to produce NC1N=C(c2ccccc2)c2ccccc2-n2cnnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.