6H-Pyrido[4,3-b]carbazolium, 9-hydroxy-2,5,11-trimethyl-, (SP-4-1)-tetrachloroplatinate(2-) (2:1) NSC620256 Platinate(2-), tetrachloro-, (SP-4-1), 9-hydroxy-2,5,11- trimethyl-6H-pyrido[4,3-b]carbazolium (1:2)