Using COc1ncc(Br)c2c(S(=O)(=O)N3CCC(NC(=O)OC(C)(C)C)C3)cccc12 to produce NC1CCN(S(=O)(=O)c2cccc3c(O)ncc(Br)c23)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.