Pyrrolizidine Alkaloids from Pardoglossum cheirifolium. - Benamar, Houari; Tomassini, Lamberto; Frezza, Claudio; Gentili, Alessandra; Tomai, Pierpaolo; Marouf, Abderrazak; Bennaceur, Malika; Serafini, Mauro (Chemistry of Natural Compounds, 2021)