1263W94 & Zalcitabine 2,4(1H,3H)-Pyrimidinedione, 1-[(2R,5S)-2,5-dihydro-5-(hydroxymethyl)-2-furanyl]-5-methyl-, compd. with 5,6-dichloro-N-(1-methylethyl)-1-.beta.-L-ribofuranosyl-1H-benzimidazol-2-amine (1:1) AIDS-170707 AIDS170707