∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C] (X Y Z : C),
  (CategoryTheory.MonoidalCategoryStruct.associator X Y Z).inv.mop =
    (CategoryTheory.MonoidalCategoryStruct.associator { unmop := Z } { unmop := Y } { unmop := X }).hom