fact: Definition associatordata_from_monoidalcatdata {C : category} (MD : monoidalcategory_data C) : associator_data MD := (pr2 (pr2 (pr2 (pr2 MD)))).
imports: UniMath.Foundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos