7770-72-1 NSC32205 Pyridinium (9CI), 1-(1',2',3,3',4,4'-hexahydro-1,1'-dioxo(2,2'-biphenanthren)-2(1H)-yl)-, iodide Pyridinium, 1-[2-(1,2,3,4-tetrahydro-1-oxo-2-phenanthryl)-1,2,3,4-tetrahydro-1-oxo-2-phenanthryl]-, iodide