[2S-(2R*,16Z,18E,20R*,21R*,22S*,23S*,24S*,25R*,26S*,27R*,28E)]-25-(Acetyloxy)-5,21,23-trihydroxy-27-Methoxy-2,4,11,16,20,22,24,26-octaMethyl-6H-27-(epoxypentadeca[1,11,13]trienonitrilo)benzofuro[4,5-e]pyrido[1,2-a]benziMidazole-1,6,15(2H;Dehydro RifaxiMin;Rifaximin impurity G (EP);Rifaximin Impurity 7 (Rifaximin EP Impurity G);Rifaximin impurity G;6-O,14-Didehydro-Rifaximin;Rifaximin Impurity 2/Rifaximin EP Impurity G/Rifaximin BP Impurity G/Dehydro Rifaximin/6-O,14-Didehydro-Rifaximin/(2S,7Z,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-5,21,23-Trihydroxy-27-methoxy-2,4,11,16,20,22,24,26-octamethyl-1,6,15-trioxo-1,2,6,7-tetrahydro-2,7-(epoxypentadeca[1,11,13]trienonitrilo)[1]benzofuro-[4,5-e]pyrido[1,2-a]benzimidazol-25-yl acetate;Rifaximin EP Impurity G