Using O=C1CCC(=O)N1Br, CCOC(=O)c1nc2scc(C)c2c(=O)[nH]1 to produce CCOC(=O)c1nc2scc(CBr)c2c(=O)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.