Using O=Cc1cccc(-c2ccc3nnn(Cc4ccc5ncccc5c4)c3n2)c1 to produce OCc1cccc(-c2ccc3nnn(Cc4ccc5ncccc5c4)c3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.