Castilleja tenuiflora Benth. (Orobanchaceae) is a species of plant hemiparasita of medicinal use; presents biological activities (cytotoxic, anti-inflammatory and anti-ulcerogenica), which are attributable to iridoides and type phenolic compounds such as flavonoids and feniletanoides. In the presence of phenolic compounds, flavonoids, quinones, etc (present in root exudates of host plants)...