Source:http://linkedlifedata.com/resource/umls/id/C0029988
MSH: Derivatives of OXALIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that are derived from the ethanedioic acid structure.,CSP: strong dicarboxylic acid or its salts or esters occurring in many plants; produced in the body by metabolism of glyoxylic acid or ascorbic acid; not metabolized but excreted in the urine.,NCI: A salt or ester of oxalic acid.