Using O=C(Nc1nnn[nH]1)c1cc2c(cc1[N+](=O)[O-])OCO2 to produce Nc1cc2c(cc1C(=O)Nc1nnn[nH]1)OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.