List of Contributors.- Synthetic Aspects of Iridoid Chemistry.- 1. Introduction.- 2. Classification of Iridoids.- 3. Availability and Production of Iridoids.- 4. Semi-Synthetic Conversions Between Iridoids.- 5. Monoterpene Alkaloids Structurally Related to lridoids.- 6. Syntheses from Iridoids.- References.- The Defensive Chemistry of Ants.- 1. Introduction.- 2. Alkaloids.- 3. Nonalkaloidal Compounds.- 4. Biosynthesis.- References.