Ivermectin EP Impurity A

Chemical Name: 5-O-demethylavermectin A1a (as per EP)

Synonym: Oxo Thiamine ; (1S,2S)-2-(methylamino)-1-phenylpropan-1-ol

Smile: O[C@]1([C@](C=C2C)([H])C(O[C@]3([H])C[C@](O[C@]4([H])[C@@H](C)CC)(C=C[C@@H]4C)O[C@@](C/C=C5\C)([H])C3)=O)[C@]([C@@H]2O)([H])OC/C1=C\C=C\[C@@H]([C@@H]5O[C@@](O[C@@H](C)[C@@H]6O[C@@](O[C@@H](C)[C@@H]7O)([H])C[C@@H]7OC)([H])C[C@@H]6OC)C