Using O=C1CCC(=O)N1Br, Cc1c(Br)sc(=NC(=O)OC(C)(C)C)n1C to produce Cc1c(Br)sc(=NC(=O)OC(C)(C)C)n1CBr, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.