HARLEN; CEDEÑO FIERRO, Valeria; SÁNCHEZ LEÓN, Ana. PP38 Preliminary Study of Secondary Metabolites in Extracts of Piper Species from the Yotoco Forest Reserve. Revista Productos Naturales, "Quebec, CA", v. 6, n. 1, p. 327–329, 2026. DOI: 10.3407/rpn.v6i1pp38. Disponível em: https://www.nozomiscience.org/index.php/rpn/article/view/10730. Acesso em: 4 feb. 2026.