130351-54-1 2,4(1H,3H)-Pyrimidinedione, 1-[3-deoxy-3-(hydroxymethyl)-.beta.-D-arabinofuranosyl]- 3'-Deoxy-3'-C-(hydroxymethyl)-.beta.-D-arabino-pentofuranosyl uracil 3'-Hydroxymethyl Ara U AIDS-001761 AIDS001761