(2S, 16Z, 18E, 20S, 21S, 22R, 23R, 24R, 25S, 26R, 27S, 28E) -25- (Acetyloxy) -6, 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, 5, 15 (2H, 11H) -trione Quick inquiry Where to buy Suppliers range (2S, 16Z, 18E, 20S, 21S, 22R, 23R, 24R, 25S, 26R, 27S, 28E) -25- (Acetyloxy) -6, 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, 5, 15 (2H, 11H) -trione is an impurity of Rifaximin (R509500), a non-absorbable semisynthetic Rifamycin antibiotic. Group: Biochemicals. Grades: Highly Purified. CAS No. 1351775-04-6. Pack Sizes: 2.5mg, 5mg. Molecular Formula: C43H49N3O11, Molecular Weight: 783.86. US Biological Life Sciences. Worldwide