http://www.mdpi.com/journal/molecules/special_issues/plant_metabolites/ Starting from 2007, we launched several special thematic special issues on plant secondary metabolites. Special Issue on Alkaloids Guest Editors: Prof. Dr. Patrícia Valentao and Prof. Dr. Mariana Sottomayor Special Issue on Phenolics (Flavonoids and Non-flavonoids, Polyphenolics) Guest Editors: Jose Alberto Pereira and Paula Andrade A related Special Issue: Polysaccharides Guest Editor: Dr. Shao-Ping Li