2-(3-Ethynylphenyl)-5-(4-(4-(2-(3-ethynylphenyl)-1,3-dioxo-4,6,7-triphenyl-2,3-dihydro-1H-isoindol-5-yl)benzyl)phenyl)-4,6,7-triphenyl-1H-isoindole-1,3(2H)-dione AIDS-134661 AIDS134661 NSC633251