2-{(4S,2R,3R,5R)-5-(5-Methyl-2,4-dioxo(1,3-dihydropyrimidinyl))-3-phenylthio-4-(1,1,2,2-tetramethyl-1-silapropoxy)-2-[(1,1,2,2-tetramethyl-1-silapropoxy)methyl]oxolan-3-yl}ethanenitrile AIDS-149786 AIDS149786 NSC685186