Oxindole

Oxindole
Names
	Preferred IUPAC name 1,3-Dihydro-2H-indol-2-one
Identifiers
CAS Number	59-48-3 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	114692
ChEBI	CHEBI:31697 ;
ChEMBL	ChEMBL40823 ;
ChemSpider	284794 ;
ECHA InfoCard	100.000.390
EC Number	200-429-5;
Gmelin Reference	637057
KEGG	C12312 ;
MeSH	Oxindole
PubChem CID	321710;
RTECS number	NM2080500;
UNII	0S9338U62H ;
CompTox Dashboard (EPA)	DTXSID80870389 ;
	InChI InChI=1S/C8H7NO/c10-8-5-6-3-1-2-4-7(6)9-8/h1-4H,5H2,(H,9,10) Key: JYGFTBXVXVMTGB-UHFFFAOYSA-N ;
	SMILES c1ccc2c(c1)CC(=O)N2;
Properties
Chemical formula	C8H7NO
Molar mass	133.150 g·mol−1
Appearance	pale yellow solid
Melting point	128 °C (262 °F; 401 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Oxindole (2-indolone) is an aromatic heterocyclic organic compound with the formula C₆H₄CH₂C(O)NH. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring. Oxindole is a modified indoline with a substituted carbonyl at the second position of the 5-member indoline ring. Classified as a cyclic amide, it is a pale yellow solid.