Ivermectin EP Impurity B

Chemical Name: 5-O-demethyl-25-de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (as per EP) ;

Synonym: N-((1R,2S)-1-hydroxy-1-phenylpropan-2-yl)-N-methylacetamide

Smile: CC([C@H]([C@H](C=C1)C)O[C@]21C[C@](OC([C@@](C=C(C)[C@@H](O)[C@@]3([H])OC/C4=C\C=C\[C@H](C)[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)([H])[C@@]34O)=O)([H])C[C@](C/C=C5\C)([H])O2)C