In organic chemistry, arynes[1] and benzynes[2] are a class of highly reactive chemical species derived from an aromatic ring by removal of two substituents. Arynes are examples of didehydroarenes (1,2-didehydroarenes in this case), although 1,3- and 1,4-didehydroarenes are also known.[3][4][5] Arynes are examples of alkynes under high strain.
century
was invoked but never defined (see the help page).