1,4-Benzenedicarboximidamide, N,N''-bis[4-[imino(methylamino)methyl]phenyl]-, tetrahydrochloride 2053-23-8 Amidino TIC HR 2166 NSC57155 SYMETAMINE Terephthalamidine, N,N''-bis[p-(methylamidino)phenyl]-, tetrahydrochloride