Frontiers in Natural Product Chemistry is a book series devoted to important advances in natural product chemistry. The series features volumes that cover all aspects of research in the chemistry and biochemistry of naturally occurring compounds, including research on natural substances derived from plants, microbes and animals. Reviews of structure elucidation, biological activity, organic and experimental synthesis of natural products as well as developments of new methods are also included in the series. Volume 10 of the series brings together 5 reviews on a variety of bioactive compounds. An overview of cistus species growing in Sardinia: a source of bioactive compoundsRoles of natural abscisic acids in fruits during fruit development and under environmental stressProgress in the research of naturally occurring biflavonoids: a look throughPlant metabolites for protecting human cells against radiation-associated damage: an integrative reviewChemical perspective and drawbacks in flavonoid estimation assays