“…Figure 24. Indole alkaloids -strychnine, brucine, asterriquinone, physostigmine, and rivastigmine [50] With methods of extraction developing since the 1960s, with many efforts concentrating on the efficiency and environmental impact of the process, terpenoid indole alkaloids and their pharmacological properties continue to attract attention as some of them are already marketed as anticancer, antihypertensive, or hypoglycemic agents, for example [52]. Some monoterpene indole alkaloids are in high demand, such as vinblastine (Catharanthus roseus) and camptothecin (Camptotheca acuminata, Nothapodytes foetida), currently used as chemotherapic drugs, and eyes have turned toward metabolic engineering.…”