2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44146We are discussing the influence of the complex structure of the QCD vacuum on the properties of the exotic multiquark states, specially the possibility for the existence of a deeply bound pentaquark. We show that the specific spin-flavor properties of the instanton induced interaction between the quarks leads to the existence of light tri- and di-quark clusters inside the pentaquark. This strong quark correlations might be behind the anomalous properties of the pentaquark.6 pages, 2 figures, Talk at XVII International Baldin Seminar on High Energy Physics Problems, Dubna, Russia, September 27 -- October 2, 2004High Energy Physics - Phenomenologytext