Progress in the chemistry of organic natural products ; Volume 113 In this book chemical studies are described mainly from literature reports appearing since 2000 inclusive of investigations performed by the present authors on the diversity in secondary metabolites of Ligularia growing in the Hengduan Mountains area of China focusing on eremophilane sesquiterpenoids and other metabolites. More than 100 Ligulariaspecies and their related genera in the plant family Senecioneae plants (Cremanthodium Cacalia Senecio and others) grow in East Asia. For many years researchers have studied the chemical constituents of these plants and terpenoids flavonoids steroids alkaloids and aromatic compounds have been isolated. Among these in particular numerous sesquiterpenoids were reported. Within this book terpenoids and aromatic compounds (total 1049) both previously unknown and known are presented. Finally genetic studies and synthesis investigations are briefly reviewed. .