3-(4-(Hydroxy(oxido)amino)phenyl)-5-(4-(4-(3-(4-(hydroxy(oxido)amino)phenyl)-4,6-dioxo-2-phenylhexahydro-5H-pyrrolo[3,4-d]isoxazol-5-yl)benzyl)phenyl)-2-phenyldihydro-2H-pyrrolo[3,4-d]isoxazole-4,6(3H\t,5H)-dione AIDS-136955 AIDS136955 NSC640252