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3-Hydroxypropenoate is a carboxylic acid.

Malonic semialdehyde is formed in the alternative pathway of propionate metabolism and in the catabolism of beta-alanine. Studies done on these pathways in cultured cells from a patient with mitochondrial malonyl-CoA decarboxylase deficiency show that malonic semialdehyde is directly converted into acetyl-CoA in man. (PMID: 6418146).

Ethylene carbonate is a carbonate ester.

Pyruvic acid or pyruvate is a simple alpha-keto acid. It is a three-carbon molecule containing a carboxylic acid group and a ketone functional group. Pyruvate is the simplest alpha-keto acid and according to official nomenclature by IUPAC, it is called alpha-keto propanoic acid. Like other keto acids, pyruvic acid can tautomerize from its ketone form to its enol form, containing a double bond and an alcohol. Pyruvate is found in all living organisms ranging from bacteria to plants to humans. It is intermediate compound in the metabolism of carbohydrates, proteins, and fats. Pyruvate is a key intermediate in several metabolic pathways throughout the cell. In particular, pyruvic acid can be made from glucose through glycolysis, converted back to carbohydrates (such as glucose) via gluconeogenesis, or to fatty acids through a reaction with acetyl-CoA. Pyruvic acid supplies energy to cells through the citric acid cycle (TCA or Krebs cycle) when oxygen is present (aerobic respiration), and alternatively ferments to produce lactate when oxygen is lacking (lactic acid). In glycolysis, phosphoenolpyruvate (PEP) is converted to pyruvate by pyruvate kinase. This reaction is strongly exergonic and irreversible. In gluconeogenesis, it takes two enzymes, pyruvate carboxylase and PEP carboxykinase, to catalyze the reverse transformation of pyruvate to PEP. Pyruvic acid is also a metabolite of Corynebacterium (PMID: 27872963).

Glucosereductone is found in alcoholic beverages. Glucosereductone is present in free and conjugated form in botrytised wines.

2-hydroxyacrylic Acid, also known as 2-Hydroxyacrylate, is classified as a member of the Carboxylic acids. Carboxylic acids are compounds containing a carboxylic acid group with the formula -C(=O)OH. 2-hydroxyacrylic Acid is considered to be soluble (in water) and acidic

Hydroxypyruvaldehyde is a ketoaldotriose, a 2-oxo aldehyde and a primary alpha-hydroxy ketone.

An alpha,beta-unsaturated monocarboxylic acid that is acrylic acid substituted by a hydroxy group at position 2." []

Pyruvic-13C3 acid is an oxo carboxylic acid and a (13)C-modified compound.