Ivermectin EP Impurity K

Chemical Name: (4R) and (4S)-5-O-demethyl-3,4,22,23-tetrahydroavermectin A1a (as per EP)

Smile: O[C@]1([C@](CC2C)([H])C(O[C@H](C3)C[C@](C/C=C4\C)([H])O[C@]53CC[C@H](C)[C@]([C@@](CC)([H])C)([H])O5)=O)[C@]([C@@H]2O)([H])OC/C1=C\C=C\[C@@H]([C@@H]4O[C@@](O[C@@H](C)[C@@H]6O[C@](C[C@H](OC)[C@H]7O)([H])O[C@H]7C)([H])C[C@@H]6OC)C