Using CCOC(=O)c1[nH]nc2c1CCN(C(=O)c1ccc3[nH]nnc3c1)C2 to produce O=C(O)c1[nH]nc2c1CCN(C(=O)c1ccc3[nH]nnc3c1)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.