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