Using O=N[O-], Nc1ccc2c(c1)C13CC2c2ccccc2C1CN(CC1CCCC1)C3 to produce Oc1ccc2c(c1)C13CC2c2ccccc2C1CN(CC1CCCC1)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.