18771-50-1 2(1H)-Pyrimidinone, tetrahydro-4-hydroxy-1-.beta.-D-ribofuranosyl- 2(1H)-Pyrimidinone, tetrahydro-4-hydroxy-1-.beta.-D-ribofuranosyl- ( ) 3,4,5, 6-Tetrahydrouridine 5,6-Dihydrouridine AIDS-160009 AIDS160009 NSC112907 THU Tetrahydrouridine