Privileged scaffolds in medicinal chemistry: An introduction; Privileged scaffolds in medicinal chemistry: A computational approach; The beta-Lactam (Azetidin-2-one) as a privileged ring in medicinal chemistry; (Benz)imidazoles; Pyrazoles; Quinolones: Privileged scaffolds in medicinal chemistry; Isoquinolines; Rhodanine; Heterocycles containinf nitrogen and sulfur as potent biologically active scaffolds; Thiirane class of gelatinase inhibitors as a privileged tempate that cross the blood-brain barrier; Coumarins; Xanthones are privileged scaffolds in medicinal chemistry - but are they over privileged?; Natural product scaffolds of value in medicinal chemistry; Ergot alkaloids; Cyclic Peptides as Privileged structures; Spirocycles as privileged structural motifs in medicinal chemistry;