In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Enantiocontrolled Synthesis of Highly Functionalized Tropanes via [5+2] Cycloaddition to η3-Pyridinylmolybdenum π-Complexes, published in 2000-11-30, which mentions a compound: 18583-60-3, Name is Potassiumtris(1-pyrazolyl)borohydride, Molecular C9H10BKN6, COA of Formula: C9H10BKN6.
A chiral, non-racemic η3-pyridinyl scaffold participates in [5+2] cycloaddition with electron-deficient alkenes, an allene, and an alkyne to give η3-allylmolybdenum bicyclic adducts. The adducts can be demetalated, providing a convergent route to highly functionalized tropanes. High enantiocontrol can be achieved throughout the cycloaddition and demetalation sequence.
When you point to this article, it is believed that you are also very interested in this compound(18583-60-3)COA of Formula: C9H10BKN6 and due to space limitations, I can only present the most important information.
Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics