利福昔明杂质2

利福昔明杂质B(2S,20S,21S,22R,23R,24R,25S,26R,27S)-5,21,23-三羧基-27-甲氧基-2,4,16,20,22,24,26-七甲基-11-亚甲基-1,6,15-三氧代-1,2,6,11-四氢化-2,7-(环氧十五[1,11,13]三烯醇亚胺)呋喃[2〞,3〞:7',8']萘[1,2':4,5]咪唑[1,2-Α]吡啶-25-基-醋酸,利福昔明杂质B（2S，20S，21S，22R，23R，24R，25S，26R，27S）-5，21，23-三羧基-27-甲氧基-2，4，16，20，22，24，26-七甲基-11-亚甲基-1，6，15-三氧代-1，2，6，11-四氢化-2，7-（环氧十五[1，11，13]三烯醇亚胺）呋喃[2〞，3〞：7’，8’]萘[1，2’：4，5]咪唑[1，2-α]吡啶-25-基-醋酸,利福昔明杂质2,利福昔明杂质B(2S,20S,21S,22R,23R,24R,25S,26R,27S)-5,21,23-三羧基-27-甲氧基-2,4,16,20,22,24,26-七甲基-11-亚甲基-1,6,15-三氧代-1,2,6,11-四氢化-2,7-(环氧十五[1,11,13]三烯醇亚胺)呋喃[2〞,3〞:7',8']萘[1,2':4,5]咪唑[1,2-Α]吡啶-25-基-醋酸

Rifaximin Impurity 2

(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;Rifaximin Impurity;Rifaximin Impurit B:(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)-;Rifaximin Impurity 2;(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[;(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-5,21,23-trihydroxy-27-methoxy-2,4,16;(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-α]benzimidazole-1,6,15(2H,11H)-trione