Using Cc1onc(-c2ccccc2)c1-c1nnc2n1Cc1ccc(Br)cc1-2, CB(O)O to produce Cc1ccc2c(c1)-c1nnc(-c3c(-c4ccccc4)noc3C)n1C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.