Ephedra is a medicinal preparation from the plant "Ephedra sinica". He developed his own isolation procedure from the Chinese herb Ma Huang ("ephedra sinica"). Ephedrine and pseudoephedrine are also found naturally in "Ephedra sinica". Ephedrine is obtained from the plant "Ephedra sinica" and other members of the genus "Ephedra". Ephedra sinica is a gymnosperm that forms stalks with buds on the end.