∀ {C : Type u_1} {D : Type u_2} [inst : CategoryTheory.Category.{v_1, u_1} C]
  [inst_1 : CategoryTheory.Category.{v_2, u_2} D] [inst_2 : CategoryTheory.HasShift C ℤ]
  [inst_3 : CategoryTheory.HasShift D ℤ] [inst_4 : CategoryTheory.Limits.HasZeroObject C]
  [inst_5 : CategoryTheory.Limits.HasZeroObject D] [inst_6 : CategoryTheory.Preadditive C]
  [inst_7 : CategoryTheory.Preadditive D] [inst_8 : ∀ (n : ℤ), (CategoryTheory.shiftFunctor C n).Additive]
  [inst_9 : ∀ (n : ℤ), (CategoryTheory.shiftFunctor D n).Additive] [inst_10 : CategoryTheory.Pretriangulated C]
  [inst_11 : CategoryTheory.Pretriangulated D] {X₁ X₂ X₃ Z₁₂ Z₂₃ Z₁₃ : C} {u₁₂ : X₁ ⟶ X₂} {u₂₃ : X₂ ⟶ X₃}
  {u₁₃ : X₁ ⟶ X₃} {comm : CategoryTheory.CategoryStruct.comp u₁₂ u₂₃ = u₁₃} {v₁₂ : X₂ ⟶ Z₁₂}
  {w₁₂ : Z₁₂ ⟶ (CategoryTheory.shiftFunctor C 1).obj X₁}
  {h₁₂ : CategoryTheory.Pretriangulated.Triangle.mk u₁₂ v₁₂ w₁₂ ∈ CategoryTheory.Pretriangulated.distinguishedTriangles}
  {v₂₃ : X₃ ⟶ Z₂₃} {w₂₃ : Z₂₃ ⟶ (CategoryTheory.shiftFunctor C 1).obj X₂}
  {h₂₃ : CategoryTheory.Pretriangulated.Triangle.mk u₂₃ v₂₃ w₂₃ ∈ CategoryTheory.Pretriangulated.distinguishedTriangles}
  {v₁₃ : X₃ ⟶ Z₁₃} {w₁₃ : Z₁₃ ⟶ (CategoryTheory.shiftFunctor C 1).obj X₁}
  {h₁₃ : CategoryTheory.Pretriangulated.Triangle.mk u₁₃ v₁₃ w₁₃ ∈ CategoryTheory.Pretriangulated.distinguishedTriangles}
  (h : CategoryTheory.Triangulated.Octahedron comm h₁₂ h₂₃ h₁₃) (F : CategoryTheory.Functor C D)
  [inst_12 : F.CommShift ℤ] [inst_13 : F.IsTriangulated], (h.map F).m₁ = F.map h.m₁