Table of Contents

Chapter 1. Marine Biodiscovery in a Changing World.- Chapter 2. The Chemistry and Chemical Ecology of Lepidopterans as Investigated in Brazil.- Chapter 3. A Timeline of Perezone, the First Isolated Secondary Metabolite in the New World, Covering the Period from 1852 to 2020.- Chapter 4. Biologically Acitive Constituents from Plants of the Genus Xanthium.- Chapter 5. Biologically Active Constituents from Plants of Genus Desmos.