Advances in Heterocyclic Chemistry, Volume 133 is the latest release in this definitive series of great importance to organic chemists, polymer chemists, and many biological scientists. Because biology and organic chemistry increasingly intersect, the associated nomenclature also is being used more frequently in explanations. Written by established authorities in the field from around the world, this comprehensive review contains comprehensive chapters on Organosilicon azoles: Structure, silylotropy and NMR spectroscopy, Recent advances in the Nenitzescu indole synthesis (1990–2019), One-pot reactions of three-membered rings giving N,O,S-heterocycles, Organometallic complexes of functionalized chelating azines: Part 2, and more.