Benzenecarboximidamide, 4,4'-[1,3-phenylenebis(iminocarbonylimino)]bis[N-[4-[imino(methylamino)methyl]phenyl]-, tetrahydrochloride NSC82515 Urea, 1,1-m-phenylenebis[3-[p-[N'-[p-(N'-methylamidino)phenyl]amidino]phenyl]-, tetrahydrochloride