Using Cn1cc(Br)nc(Nc2ccc3c(c2)CCN(C(=O)OC(C)(C)C)C3)c1=O to produce Cn1cc(Br)nc(Nc2ccc3c(c2)CCNC3)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.