Benzenecarboximidamide, 4,4'-[1,4-phenylenebis(iminocarbonylimino)]bis[N-[4-[imino[[4-[imino(methylamino)methyl]phenyl]amino]methyl]phenyl]-, hexahydrochloride NSC80970 Urea, 1,1'-p-phenylenebis[3-[p-[N'-[p-[N'-[p-(N'-methylamidino)phenyl]amidino]phenyl]amidino]phenyl]-, hexahydrochloride