Using C1COCCN1, CCOC(=O)c1ccc(-c2c(O)[nH]c3ccc([N+](=O)[O-])cc23)nc1 to produce O=C(c1ccc(-c2c(O)[nH]c3ccc([N+](=O)[O-])cc23)nc1)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.