Using CCOC(=O)N1CCN(C(=O)CN)CC1, O=C(O)c1csc(-c2ccccc2)n1 to produce CCOC(=O)N1CCN(C(=O)CNC(=O)c2csc(-c3ccccc3)n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.