Using CN(Cc1cccc2cc(S(=O)(=O)c3ccccc3)ccc12)C(=O)OC(C)(C)C to produce CNCc1cccc2cc(S(=O)(=O)c3ccccc3)ccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.