∀ {C : Type u_1} [inst : CategoryTheory.Category.{v, u_1} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : CategoryTheory.Limits.HasBinaryCoproducts C] [inst_3 : CategoryTheory.IsMonoidalRightDistrib C]
  {X Y Z Z_1 : C} (h : CategoryTheory.MonoidalCategoryStruct.tensorObj (Y ⨿ Z) X ⟶ Z_1),
  CategoryTheory.CategoryStruct.comp CategoryTheory.Limits.coprod.inl
      (CategoryTheory.CategoryStruct.comp (∂R X Y Z).hom h) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight CategoryTheory.Limits.coprod.inl X) h