(3R*,4S*,5S*,6R*,7R*,9R*,11R*,12R*,13S*,14R*)-4- [(2,6-Dideoxy-3-C-methyl-3-O-methyl-.alpha.-L- ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13- trihydroxy-3,5,9,11,13-hexamethyl-6-[[3,4,6- trideoxy-3- AIDS-008710 AIDS008710 Erythromycin & Sulfisoxazole