Synonyms: 2,7-(Epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,15(2H)-dione,25-(acetyloxy)-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11,16,20,22,24,26-octamethyl-,[2S-(2R*,16Z,18E,20R*,21R*,22S*,23S*,24S*,25R*,26S*,27R*,28E)]-; L 105; L 105(ansamacrolide antibiotic); L 105SV; Rifamycin L 105; Rifamycin L 105SV;Rifaximin; Xifaxan; refaximin