Using CC(C)c1nc2c(n1Cc1ccc(Cl)cc1)C(O)CCC2, CC(C)(C)OC(=O)CBr to produce CC(C)c1nc2c(n1Cc1ccc(Cl)cc1)C(OCC(=O)OC(C)(C)C)CCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.