1-Carboxy-4-hydroxy-2,5-cyclohexadiene-1-pyruvic acid 126-49-8 2,5-Cyclohexadiene-1-propanoic acid, 1-carboxy-4-hydroxy-a-oxo- (9CI) 2,5-Cyclohexadiene-1-propanoic acid, 1-carboxy-4-hydroxy-alpha-oxo- 2,5-Cyclohexadiene-1-pyruvic acid, 1-carboxy-4-hydroxy- 2,5-Cyclohexadiene-1-pyruvic acid, 1-carboxy-4-hydroxy- (6CI,7CI,8CI) Prephenate Prephenic acid