Wiktionary
tartronic acid
n. (context organic compound English) An organic acid obtained by reduction of mesoxalic acid.
Wikipedia
Tartronic acid
Tartronic acid or 2-hydroxymalonic acid is a dicarboxylic acid with the structural formula of HOOCCH(OH)COOH.
Its derivative, 2-methyltartronic acid, is isomalic acid.