Application Notes |
(2S, 16Z, 18E, 20S, 21S, 22R, 23R, 24R, 25S, 26R, 27S, 28E)-25-(Acetyloxy)-5, 21, 23-trihydroxy-27-methoxy-2, 4, 16, 20, 22, 24, 26-heptamethyl-11-methylene-2, 7-(epoxypentadeca[1, 11, 13]trienimino)benzofuro[4, 5-e]pyrido[1, 2-a]benzimidazole-1, 6, 15(2H, 11H)-trione is an impurity of Rifaximin (R509500), a non-absorbable semisynthetic Rifamycin antibiotic. |