∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C] {D : Type u₂}
  [inst_2 : CategoryTheory.Category.{v₂, u₂} D] [inst_3 : CategoryTheory.MonoidalCategory D]
  {F : CategoryTheory.Functor C D} {G : CategoryTheory.Functor D C} (adj : F ⊣ G) [inst_4 : F.OplaxMonoidal]
  [inst_5 : G.LaxMonoidal] [adj.IsMonoidal] (X Y : C) {Z : C}
  (h : G.obj (CategoryTheory.MonoidalCategoryStruct.tensorObj (F.obj X) (F.obj Y)) ⟶ Z),
  CategoryTheory.CategoryStruct.comp (adj.unit.app (CategoryTheory.MonoidalCategoryStruct.tensorObj X Y))
      (CategoryTheory.CategoryStruct.comp (G.map (CategoryTheory.Functor.OplaxMonoidal.δ F X Y)) h) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.tensorHom (adj.unit.app X) (adj.unit.app Y))
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ G (F.obj X) (F.obj Y)) h)