Using O=N[O-], CCOC(=O)C1(C(=O)OCC)CCc2nc(N)[nH]c(=O)c2C1 to produce CCOC(=O)C1(C(=O)OCC)CCc2[nH]c(=O)[nH]c(=O)c2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.