57061-17-3

2-(3-Hydroxy-2-oxoindolin-3-yl)-acetic acid (compound 29) is a natural polyphenol compound found in hop bract[1].

ChEBI: 1H-Indole-3-acetic acid, 2,3-dihydro-3-hydroxy-2-oxo- is an indolyl carboxylic acid.

[1] Yoshihisa Tanaka, et al. Comprehensive separation and structural analyses of polyphenols and related compounds from bracts of hops (Humulus lupulus L.). J Agric Food Chem. 2014 Mar 12;62(10):2198-206. DOI:10.1021/jf405544n