Using O=C(O)c1ccc(Cl)c(Cl)c1, CC(C)(C)OC(=O)CN(C(=O)CN)c1ccccc1 to produce CC(C)(C)OC(=O)CN(C(=O)CNC(=O)c1ccc(Cl)c(Cl)c1)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.