105432-59-5 AIDS-113126 AIDS113126 Acetic acid, [[(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]-, 2-(aminothioxomethyl)hydrazide Rifamycin B, 2-(aminothioxomethyl)hydrazide