What is "isoindoline"

n. (context organic compound English) The isomer of indoline ''2-indoline''

Isoindoline is a heterocyclic organic compound with the molecular formula CHN. The parent compound has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring. The compound's structure is similar to indoline except that the nitrogen atom is in the 2 position instead of the 1 position of the five-membered ring. Isoindoline itself is not commonly encountered, but several derivatives are found in nature and some synthetic derivatives are commercially valuable drugs, e.g. pazinaclone.