Using CC1CN(C(=O)OC(C)(C)C)Cc2scc(C(C)C)c2O1, O=C1CCC(=O)N1Br to produce CC1CN(C(=O)OC(C)(C)C)Cc2sc(Br)c(C(C)C)c2O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.