Using CC(C)(C)OC(=O)NC(C)(C)C(=O)NCc1ccc(Cl)c(Cl)c1 to produce CC(C)(CNCc1ccc(Cl)c(Cl)c1)NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.