Using CCCCNc1c(N)c(NCC(C)C)nc(C)c1C(=O)OCC, O=N[O-] to produce CCCCNc1c(C(=O)OCC)c(C)nc2c1nnn2CC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.