1-[3-Deoxy-3-C-(4,5-dihydro-5-methyl-1,3,5-dithiazin-2-yl)-.beta.-D-arabino-pentofuranosyl]uracil 130351-52-9 2,4(1H,3H)-Pyrimidinedione, 1-[3-deoxy-3-(dihydro-5-methyl-4H-1,3,5-dithiazin-2-yl)-.beta.-D-arabinofuranosyl]- 3'-(5-Me-1,3,5-dithiazin)-Ara-U AIDS-001766 AIDS001766