6-(Hydroxy(phenyl)methyl)-1-(2,2,4,4-tetraisopropyltetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-8-yl)dihydro-2,4(1H,3H)-pyrimidinedione AIDS-148484 AIDS148484 NSC680834