The Geography of Phytochemical Races

4.5 Western Pacifi c: Eastern Asia, Japan, and the Philippines 211
Fig. 4.16 Compounds 372–376, fl avonoids from Euchresta
of chemical features in the genus involved is the C-prenylation of fl avanones (both
types), isofl avones, and coumaronochromones. In some instances, fl avonoids with
as many as three C-prenyl groups were identifi ed. The enzymes involved in these
reactions are listed in Fig. 4.16, using the notation from the original paper (Matsuura
et al., 1994). Based upon the compounds isolated from each species, it was
possible for those workers to set up a data array showing the presumed presence of
each of the enzyme systems. That information, along with the area of origin of the
species, appears in Table 4.7. Using the morphologically related Sophora tonkinensis
Gagnepain as outgroup, the authors subjected the data set to parsimony analysis
using the Wagner method. Results of this analysis are illustrated in Fig. 4.17. The
authors also determined trends in the ratio of fl avone and O- and C-glycosides based