4,4'-Dithiobis{N-[(1E)-(4-chlorophenyl)methylene]aniline}-[(1E)-(4-chlorophenyl)methylene]{4-[(4-{[(1E)-(4-chlorophenyl)methylene]amino}phenyl)dithio]phenyl}amine AIDS-032790 AIDS032790 Aminobenzene disulfide analog NSC677548