∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.MonoidalCategory C] (X Y Z W : C)
  [inst_2 :
    CategoryTheory.MonoidalCoherence
      (CategoryTheory.MonoidalCategoryStruct.tensorObj X (CategoryTheory.MonoidalCategoryStruct.tensorObj Y Z)) W],
  CategoryTheory.MonoidalCoherence.iso =
    CategoryTheory.MonoidalCategoryStruct.associator X Y Z ≪≫ CategoryTheory.MonoidalCoherence.iso