Pentacyclic triterpenes are a class of natural products that are present in Dipsacus asperoides with a long history of use. Pharmacological studies have shown that pentacyclic triterpenes have various
Amphetamine analogues are produced by plants in the genus Ephedra and by khat (Catha edulis), and include the widely used decongestants and appetite suppressants (1S,2S)-pseudoephedrine and (1R,2S)-ep