Using BrBr, CC(=O)CCCCn1cnc2c1c(=O)n(C)c(=O)n2C to produce Cn1c(=O)c2c(ncn2CCCCC(=O)CBr)n(C)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.