Using CCOC(=O)C(=O)C[n+]1c(N)c(C(N)=O)nc2ccccc21 to produce CCOC(=O)c1cn2c(n1)c(C(N)=O)nc1ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.