Pyrrolizidine alkaloids from three Spanish Senecio species

In continuation of our chemical studies on the Andalusian Flora (Valpuesta et al., 1995, 1999; Suau et al., 1998, 2002), we focused on the genus Senecio in our search for pyrrolizidine alkaloids (PAs). We collected three endemic species, viz. Senecio elodes Boiss. ex DC. (MGC 25920) and S. granatensis Boiss. (MGC 20646) from Sierra Nevada (Granada, Spain), and S. malacitanus L. (MGC 30068) from El Pantano del Agujero (Malaga, Spain). Voucher specimens are deposited at the Herbarium of the Department of Botany of the University of Malaga (MGC).