(-)-9-[(1S,4R)-2,3-Dideoxy-2,3-didehydro-2-fluoro-4-thio-beta-L-ribofuranosyl]-2-fluoroadenosine AIDS-163233 AIDS163233 [5-(6-Amino-2-fluoro-purin-9-yl)-4-fluoro-2,5-dihydro-thiophen-2-yl]-methanol