Using CC(=O)OC(C)=O, Nc1nc2nc[nH]c2c(=O)[nH]1 to produce CC(=O)N(C(C)=O)c1nc2nc[nH]c2c(=O)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.