. . "A strong dicarboxylic acid occurring in many plants and vegetables. It is produced in the body by metabolism of glyoxylic acid or ascorbic acid. It is not metabolized but excreted in the urine. It is used as an analytical reagent and general reducing agent. [PubChem]"@en . . " "@en . . . . . "144-62-7"@en . . . . . . . . . . . . . . . . "Oxalic Acid"@en . . . . . . . "Giuseppe Messina, Giovanni M. Sechi, Loreno Lorenzoni, Giovanni Chessa, \"Method of preparation of oxalic acid esters and amides.\" U.S. Patent US4981963, issued July, 1971."@en . . . . . . "experimental"@en . . . . .