25-Desacetyl Rifaximin

Chemical Name: [2S-(2R*,16Z,18E,20R*,21R*,22S*,23S*,24S*,25R*,26R*,27R*,28E)]-5,6,21,23,25-Pentahydroxy-27-methoxy-2,4,11,16,20,22,24,26-octamethyl-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,15(2H)-dione

Smile: O=C1C(C2=C3C(O)=C(NC(/C(C)=C\C=C\[C@H](C)[C@H](O)[C@@H](C)[C@@H](O)[C@H]4C)=O)C5=C2N=C6N5C=CC(C)=C6)=C(C(C)=C3O)O[C@@]1(O/C=C/[C@@H]([C@H]([C@H]4O)C)OC)C