Using CCOC(=O)N1CC2c3sc(C)cc3C(C)C2C1, O=C1CCC(=O)N1Br to produce CCOC(=O)N1CC2c3sc(C)c(Br)c3C(C)C2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.