Using COc1cc(C(=O)OC(C)(C)C)cc(NC(=O)CCCBr)n1 to produce COc1cc(C(=O)OC(C)(C)C)cc(N2CCCC2=O)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.