Rifamycin Impurity B

Chemical Name: [(2S,12Z,14E,16S,17S,18R,19R,20R,21S,22R,23S,24E)-5,17,19-trihydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,6,9,11-tetraoxo-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienazano)naphtho[2,1-b]furan-21-yl acetate

Smile: O=C(C=C1NC(/C(C)=C\C=C\[C@@](C)([H])[C@@](O)([H])[C@](C)([H])[C@](O)([H])[C@](C)([H])[C@@](OC(C)=O)([H])[C@@]2(C)[H])=O)C3=C(C(O)=C(C)C(O[C@]4(C)O/C=C/[C@]2([H])OC)=C3C4=O)C1=O