AIDS-093478 AIDS093478 D-Xylo-heptopyranoside, (5xi)-6,7-dideoxy-7-[[1-(hydroxymethyl)propyl]amino]-.alpha.-D-xylo-heptopyranosyl 6,7-dideoxy-7-[[1-(hydroxymethyl)propyl]amino]-, (5xi)- Ethambutol-sugar hybrid