Rifaximin EP Impurity H

Chemical Name:  (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-5,6,21,23-tetrahydroxy-16-(hydroxymethyl)-27-methoxy-2,4,11,20,22,24,26-heptamethyl-1,15-dioxo-1,2-dihydro2,7-(epoxypentadeca[1,11,13]trienoimino)[1]benzofuro[4,5-e]pyrido[1,2-a]benzimidazol-25-yl acetate (16-desmethyl-16-(hydroxymethyl)rifaximin)

Smile: CC1=CC2=NC3=C(C(N4)=C(O)C5=C3C6=C(O[C@](C)(O/C=C/[C@]([H])(OC)[C@@]([H])(C)[C@@]([H])(OC(C)=O)[C@]([H])(C)[C@]([H])(O)[C@@](C)([H])[C@@]([H])(O)[C@](C)([H])/C=C/C=C(CO)\C4=O)C6=O)C(C)=C5O)N2C=C1