Chemical composition and evaluation of the antimicrobial activity of Valeriana prionophylla Standl. from Guatemala - Perez Sabino Juan, F; Muñoz Wug Manuel, A; Mérida Reyes Max, S; Oliva Bessie, E; Taracena, E; Gaitán isabel, C; Martínez José, V; Ribeiro da Silva Antonio, J (Planta Medica International Open, 2017)