given the scientific name quebrachine, seeing that it was first isolated from the quebracho tree and first named in the scientific literature. However the later work on P. yohimbe was better known, so the newer name stuck. Other plants Yohimbine has also been isolated from other plant genera in the family Apocynaceae including Lochnera (Catharanthus), Rauvolfia, Amsonia, Vallesia and Vinca; from the family Loganiaceae (genera Gelsemium and Strychnos); and from the family Euphorbiaceae (genus Alchornea). Doping There was a case in the World Anti-Doping Agency practice in 2007, when an athlete, who reportedly consumed Yohimbine prior to a given athletic event, was later tested positive for 19-norandrosterone, which is a prohibited substance. However, WADA did not yet list Yohimbine (which can come into a body via an energy drink, also in a form of pre-workout supplement or fat burner) as a prohibited substance, nor did it confirm that its use can increase the endogenous level of anabolic steroids, in particular of 19-norandrostenedione and testosterone. See also Ajmalicine Alstonine Corynanthine Deserpidine Mitragynine Rauwolscine Spegatrine Reserpine Rescinnamine References External links Alkaloids found in Euphorbiaceae Alkaloids found in Rauvolfia Alpha-1 blockers Alpha-2 blockers Anxiogenics Entheogens Tryptamine alkaloids Quinolizidine alkaloids Indoloquinolizines Norepinephrine releasing agents Stimulants Sympathomimetics Vasoconstrictors Vasodilators