Using OB(O)c1cccc(-n2cccn2)c1, CNC(=O)c1cccc(-c2ccn3c(Br)cnc3c2)c1 to produce CNC(=O)c1cccc(-c2ccn3c(-c4cccc(-n5cccn5)c4)cnc3c2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.