Using O=[N+]([O-])[O-], COC(=O)Cc1ccc2c(c1)CCN2C(C)=O to produce COC(=O)Cc1cc2c(c([N+](=O)[O-])c1)N(C(C)=O)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.