1. Ecological Chemistry Group, Department of Chemistry, University of Los Andes, University
Nucleus Pedro Rincón Gutiérrez, La Hechicera, 5101-A Mérida, Venezuela
2. Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, C/República Saharaui, 7, 11510 Puerto Real, Cádiz, Spain
3. Departement de la Biologie, Faculte des Sciences, Universite Abdelmalek Essaadi, BP 2121, 93002 Tetouan, Morocco