6-{5-[({(9S,19S,1R,2R,3R,5R,8R,17R)-2-[(2S,4S,3R,6R)-4-(Dimethylamino)-3-hydroxy-6-methyl(2H-3,4,5,6-tetrahydropyran-2-yloxy)]-8-ethyl-9-hydroxy-1,3,5,9,17,19-hexamethyl-4,6-dioxo-18-(2-oxo-1-azapropylidene)-7,11,15-trioxabicyclo[8.5.4]nonadec-13-ylidene}azamethoxy)methyl]isoxazol-3-yl}pyridine-2-carbonitrile AIDS-184228 AIDS184228