Using OB(O)c1cc(Cl)cc(Cl)c1Cl, CN(N)C(=O)OC(C)(C)C to produce CN(Nc1cc(Cl)cc(Cl)c1Cl)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.