Rauwolfia plant bark

From the roots of Rauwolfia cambodiana, the alkaloids pelirine and ajmaline have been isolated (73). The alkaloids akuammicine, akuammi-cine Nb-oxide, akuammicine Nb-methiodide, pseudoakuammigine, and tubotaiwine have been newly recorded from the root bark of Alstonia scholaris R.Br. (Apocynaceae) echitamine is isolated as the major alkaloid, along with Nb-demethylechitamine, as well as three unidentified echitamidine isomers, and other known alkaloids. The stems of the same plant yielded echitamine, Nb-demethylechitamine, tubotaiwine, pricri-nine, and other unidentified echitamidine isomers (81,82). Apart from the alkaloids in the heteroyohimbine group from roots of Rauwolfia serpentina, a new base, named ajmalimine (73) (53), and ajmalinimine (74)... 

Ajtnalicine is found in plants belonging to Apocynaceae, namely, Catharanthus roseus, Rauwolfia serpentina, and Rauwolfia vomitoria. Ajmalicine was first isolated from yohimbe bark and is one of the principal alkaloids of Catharanthus roseus and widely used to treat circulatory disorders [6] (Fig. 20.3). Ajmalicine is... 

---