111990-20-6 16783-99-6 17312-33-3 21494-93-9 25-Deacetylrifampicin 25-Deacetylrifampin 25-Desacetylrifampicin 43072-06-6 Desacetylrifampicin Rifamycin, 25-O-deacetyl-3-(((4-methyl-1-piperazinyl)imino)methyl)-