∀ (C : Type u_2) [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.MonoidalCategory C] (X Y : C),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.CategoryStruct.id
        ((CategoryTheory.MonoidalOpposite.mopMopEquivalence C).inverse.obj
          (CategoryTheory.MonoidalCategoryStruct.tensorObj X Y)))
      (CategoryTheory.CategoryStruct.id
        (CategoryTheory.MonoidalCategoryStruct.tensorObj
          ((CategoryTheory.MonoidalOpposite.mopMopEquivalence C).inverse.obj X)
          ((CategoryTheory.MonoidalOpposite.mopMopEquivalence C).inverse.obj Y))) =
    CategoryTheory.CategoryStruct.id
      ((CategoryTheory.MonoidalOpposite.mopMopEquivalence C).inverse.obj
        (CategoryTheory.MonoidalCategoryStruct.tensorObj X Y))