Using COC(=O)c1ccccc1CSc1nc2ccccc2[nH]1, CC(C)(C)OC(=O)CBr to produce COC(=O)c1ccccc1CSc1nc2cccc(CC(=O)OC(C)(C)C)c2[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.