Using COC(=O)C(=Cc1cccc2nonc12)[N+](=O)[O-], CC(=O)CC(=O)OC(C)C to produce COC(=O)C(C(c1cccc2nonc12)C(C(C)=O)C(=O)OC(C)C)[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.