Using CSC1=NCCN1, NC1c2ccccc2C=Cc2ccc(Br)cc21 to produce Brc1ccc2c(c1)C(N=C1NCCN1)c1ccccc1C=C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.