Using COC(=O)c1ccc(=O)n(CCCNC(=O)c2ccccn2)c1 to produce O=C(O)c1ccc(=O)n(CCCNC(=O)c2ccccn2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.