1-(1,4-Anhydro-2,3,6,8-tetradeoxy-.beta.-D-and .alpha.-L-glycero-oct-3-en-7-ulosyl)thymine 131118-71-3 (R-[R*,S*]) 131118-72-4 (R-[R*,R*]) 2,4(1H,3H)-Pyrimidinedione, 1-[2,3-dihydro-5-(1-hydroxy-3-oxobutyl)-2-furanyl]-5-methyl-, [R-(R*,R*)]-/[R-(R*,S*)]- 5'C-CH3COCH2-3',4'-didehydro-dT AIDS-001920 AIDS001920