. . . . . . . . . . . . "Leandro Baiocchi, \"Process for the synthesis of isatin derivatives.\" U.S. Patent US4256639, issued July, 1968."@en . . . "1H-indole-2,3-dione"@en . . . . . . . . . . . "Isatin is 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 is found in many plants and Schiff bases of Isatin are investigated for their pharmaceutical properties. [Wikipedia]"@en . . . . . . . . . . . . "91-56-5"@en . . "Isatin"@en . "experimental"@en . . . . . .