Using CSc1nc(Cl)c2nc(-c3cc(C)c(O)c(C)c3)oc2n1, CC(C)(C)OC(=O)CBr to produce CSc1nc(Cl)c2nc(-c3cc(C)c(OCC(=O)OC(C)(C)C)c(C)c3)oc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.