2. Secondary metabolites: compounds produced that aren't involved in photosynthesis and respiration; used as protection from predation.
3. Alkaloids: nitrogen containing, cyclic compounds.
4. Peyote, Psilocybe, Opium, Coca, etc.
5. Effects: mild (medicinal) to stimulant to hallucinogen to poison.
5. Uses of drug plants VERY different in aboriginal cultures compared to modern cultures.