| PubChem = | SMILES = O=C1c2ccccc2NC1=O | InChI=1/C8H5NO2/c10-7-5-3-1-2-4-6(5)9-8(7)11/h1-4H,(H,9,10,11) }} | Section2 = | Section3 = }} }} Isatin or 1H-indole-2,3-dione's an indole derivative. The compound was first obtained by Erdman and Laurent in 1841 as a product from the oxidation of indigo dye by nitric acid and chromic acids. The compound's found in many plants. Schiff bases of isatin are investigated for their pharmaceutical properties . It was observed that isatin forms a blue dye if… (More on Isatin)