5-(4-Chlorobenzyl)-4-((4-((3-(4-chlorobenzyl)-5-oxo-1,5-dihydro-4H-1,2,4-triazol-4-yl)imino)butylidene)amino)-2,4-dihydro-3H-1,2,4-triazol-3-one AIDS-149207 AIDS149207 NSC683289