4-[4-methyl-2-(1,4,7,9,9b-pentaaza-cyclopenta[a]naphthalen-6-ylamino)-phenylsulfanyl]-phenol

4-((2-((7-methoxypyrimido[4,5-d]pyrimidin-4-yl)amino)-4-methylphenyl)thio)phenol

4-((2-((7-ethoxypyrimido[4,5-d]pyrimidin-4-yl)amino)-4-methylphenyl)thio)phenol

4-((4-methyl-2-((7-phenoxypyrimido[4,5-d]pyrimidin-4-yl)amino)phenyl)thio)phenol