Sen, S. P. published the artcilePaper chromatography of plant-growth regulators and allied compounds, Formula: C8H6KNO4S, the publication is Physiologia Plantarum (1954), 98-108, database is CAplus.
The chromatog. behavior of a number of indole derivatives in several solvent systems is described, along with their detection by fluorescence in UV light and their color reactions with FeCl3-HClO4, p-dimethylaminobenzaldehyde, KNO2-HNO3, cinnamaldehyde-HCl, dichloroquinone chlorimide, and other reagents. The following compounds were tested: indole, 2-methylindole, 3-methylindole, 3-indolecarboxylic acid, 3-indoleacetic acid, 3-indolepropionic acid, 3-indolebutyric acid, 3-indolecarboxaldehyde, 3-indoleacetaldehyde, 3-indoleacetonitrile, 3-indolebutyronitrile, Et 3-indoleacetate, tryptophan, tryptamine, gramine, isatin, N-acetylisatin, dihydroxyindole, indican, indican glucoside, indoxylacetate, N-acetylindoxyl, indigotin, indigodisulfonate, indigotetrasulfonate, and indirubin. Rf values, as detected by spraying with bromocresol green, were also determined for a number of aromatic acids. These included 1-naphthaleneacetic acid; 2-naphthoxyacetic acid; phenylacetic acid; phenoxyacetic acid, and its 慰-chloro, p-chloro, 2,4-dichloro, and 3,4,5-trichloro derivatives; and benzoic acid and its following derivatives: 慰-bromo, m-bromo, p-bromo, 慰-chloro, m-chloro, p-chloro, 2,4-dichloro, 3,4-dichloro, 2,3,5-triiodo, m-hydroxy; p-hydroxy, 2,4-dihydroxy, 慰-amino, p-amino, 2,5-dinitro, 3,5-dinitro, 2-amino-5-chloro, and 2-chloro-5-nitro.
Physiologia Plantarum published new progress about 2642-37-7. 2642-37-7 belongs to indole-building-block, auxiliary class Indole,Salt,Sulfonate,Inhibitor,Inhibitor, name is Potassium 1H-indol-3-yl sulfate, and the molecular formula is C9H7NO3, Formula: C8H6KNO4S.
Referemce:
https://www.nature.com/articles/s41429-020-0333-2,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles