Absolute Configuration Assignment and Enantiopurity Determination of Chiral Alkaloids and Coumarins Derived from O- and C-Prenyl Epoxides.

A combination method of ozonolysis and chiral stationary phase (CSP)-GC–MS analysis has been developed to determine the enantiopurity values and absolute configurations of a range of alkaloid and coumarin hemiterpenoids derived from C- and O-prenyl epoxides.