Chemical structure iridoids

In addition to the compounds described above, actinidine is also isolated from mokutenryou [1,2,9], As estimated by comparing the chemical structures of actinidine and the iridoids described above, these compounds are derived from a common biosynthetic pathway. 

Figure 8. Chemical structures of some iridoids isolated from Comus fruits.

FIGURE 53.3. Chemical structures and AC of the iridoids omwa-cin and plumericin. 

Van der Eye ken E, De Bruyn A, Van der Eycken J, Gallant P, Vandewalle M 1986 Iridoids The structure elucidation of specionin based on chemical evidence and NMR analysis. Tetrahedron... 

Southeast Asia, and about 15 species are distributed in Japan [2], There is a long history of the folk medicinal use of Viburnum species. For example, the dried bark of V. opulus L., which is known as Cramp Bark, is used to alleviate painful menstrual cramps as well as a sedative [3], Native American women took black haw (V. prunifolium L.) to treat the menopause and menstrual cramps [4], The genus Viburnum has been documented to contain a variety of compounds such as iridoids, terpenoids, and aromatic compounds [5,6]. Among the chemical contents of Viburnum species, vibsane-type diterpenoids are considered to be characteristic of the Viburnum species because they have not been fotmd in other higher plants. In this review [7], we focus on the structural diversity, biological activities, and synthesis of vibsane-type diterpenoids, in particular, synthetic studies and neurotrophic activity of neo-vibsanin A and B are emphasized. 

---