fact: Definition monoidal_struct_to_pentagontriangle {C : category} (M : monoidal_struct C) : pentagontriangle M := pr12 M.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors UniMath.CategoryTheory.Monoidal.Categories