AIDS-113863 AIDS113863 Acetamide, 2-[[(2S,16S,17S,18R,19R,20R,21S,22R,23S)-21-(acetyloxy)-1,2-dihydro-5,6,17,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-2,7-(epoxy[1,11,13]pentadecatrienoimino)naphtho[2,1-b]furan-9-yl]oxy]-N,N-dimethyl- Rifamycin B, N,N-dimethylamide