1263W94 & Zidovudine 2,4(1H,3H)-Pyrimidinedione, 1-(3-azido-2,3-dideoxy-.beta.-D-erythro-pentofuranosyl)-5-methyl-, compd. with 5,6-dichloro-N-(1-methylethyl)-1-.beta.-L-ribofuranosyl-1H-benzimidazol-2-amine (1:1) AIDS-170704 AIDS170704