1. Chemistry Department, Simón Bolívar University, Caracas, Venezuela;
2. Bioinorganic Chemistry Laboratory, Chemistry Center, Venezuelan Institute of Scientific Research, Caracas, Venezuela;
3. Center of Equilibria in Solution, Chemistry School, Science Faculty, Central University of Venezuela, Caracas, Venezuela;
4. Medicinal Chemistry Unit, Faculty of Pharmacy, School “Dr. Jesús María Bianco”, Central University of Venezuela, Caracas, Venezuela