∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C] {M N P : C}
  [inst_2 : CategoryTheory.MonObj M] [inst_3 : CategoryTheory.MonObj N] [inst_4 : CategoryTheory.MonObj P],
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.MonoidalCategoryStruct.leftUnitor (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)).inv
        (CategoryTheory.MonoidalCategoryStruct.tensorHom
          (CategoryTheory.CategoryStruct.comp
            (CategoryTheory.MonoidalCategoryStruct.leftUnitor (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)).inv
            (CategoryTheory.MonoidalCategoryStruct.tensorHom CategoryTheory.MonObj.one CategoryTheory.MonObj.one))
          CategoryTheory.MonObj.one))
      (CategoryTheory.MonoidalCategoryStruct.associator M N P).hom =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.leftUnitor (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)).inv
      (CategoryTheory.MonoidalCategoryStruct.tensorHom CategoryTheory.MonObj.one
        (CategoryTheory.CategoryStruct.comp
          (CategoryTheory.MonoidalCategoryStruct.leftUnitor (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)).inv
          (CategoryTheory.MonoidalCategoryStruct.tensorHom CategoryTheory.MonObj.one CategoryTheory.MonObj.one)))