<Ul> <Li> Alkaloids (usually a small, heavily derivated amino acid): <Ul> <Li> Hyoscyamine, present in Datura stramonium </Li> <Li> Atropine, present in Atropa belladonna, Deadly nightshade </Li> <Li> Cocaine, present in Erythroxylum coca the Coca plant </Li> <Li> Scopolamine, present in the Solanaceae (nightshade) plant family </Li> <Li> Codeine and Morphine, present in Papaver somniferum, the opium poppy </Li> <Li> Tetrodotoxin, a microbial product in Fugu and some salamanders </Li> <Li> Vincristine & Vinblastine, mitotic inhibitors found in the Rosy Periwinkle </Li> </Ul> </Li> <Li> Terpenoids (come from semiterpene oligomerization): <Ul> <Li> Azadirachtin, (Neem tree) </Li> <Li> Artemisinin, present in Artemisia annua Chinese wormwood </Li> <Li> tetrahydrocannabinol, present in cannabis </Li> <Li> Steroids (Terpenes with a particular ring structure) <Ul> <Li> Saponins (plant steroids, often glycosylated) </Li> </Ul> </Li> </Ul> </Li> <Li> Flavonoids (or bioflavonoids) (from the Latin word flavus meaning yellow, their color in nature) are a class of plant and fungus secondary metabolites): <Ul> <Li> isoflavanoids & neoflavanoids, flavone, flavanones </Li> </Ul> </Li> <Li> Glycosides (heavily modified sugar molecules): <Ul> <Li> Nojirimycin </Li> <Li> Glucosinolates </Li> </Ul> </Li> <Li> Natural phenols: <Ul> <Li> Resveratrol </Li> </Ul> </Li> <Li> Phenazines: <Ul> <Li> Pyocyanin </Li> <Li> Phenazine - 1 - carboxylic acid (and derivatives) </Li> </Ul> </Li> <Li> Biphenyls and dibenzofurans are phytoalexins of the Pyrinae </Li> </Ul> <Li> Alkaloids (usually a small, heavily derivated amino acid): <Ul> <Li> Hyoscyamine, present in Datura stramonium </Li> <Li> Atropine, present in Atropa belladonna, Deadly nightshade </Li> <Li> Cocaine, present in Erythroxylum coca the Coca plant </Li> <Li> Scopolamine, present in the Solanaceae (nightshade) plant family </Li> <Li> Codeine and Morphine, present in Papaver somniferum, the opium poppy </Li> <Li> Tetrodotoxin, a microbial product in Fugu and some salamanders </Li> <Li> Vincristine & Vinblastine, mitotic inhibitors found in the Rosy Periwinkle </Li> </Ul> </Li> <Ul> <Li> Hyoscyamine, present in Datura stramonium </Li> <Li> Atropine, present in Atropa belladonna, Deadly nightshade </Li> <Li> Cocaine, present in Erythroxylum coca the Coca plant </Li> <Li> Scopolamine, present in the Solanaceae (nightshade) plant family </Li> <Li> Codeine and Morphine, present in Papaver somniferum, the opium poppy </Li> <Li> Tetrodotoxin, a microbial product in Fugu and some salamanders </Li> <Li> Vincristine & Vinblastine, mitotic inhibitors found in the Rosy Periwinkle </Li> </Ul> <Li> Hyoscyamine, present in Datura stramonium </Li>

Why are some molecules called bioactive molecules give two examples of such molecules