Monoethanolamine oleate (properly ethanolammonium oleate) is an antivaricose agent. It is a salt formed by Lowry-Brønsted acid-base reaction between monoethanolamine and oleic acid

Oleic acid

Oleic acid is a monounsaturated omega-9 fatty acid found in various animal and vegetable fats. It has the formula CH37CH=CH7COOH. It is an odorless, colourless oil, although commercial samples may be yellowish. The trans isomer of oleic acid is called elaidic acid...

, is systematically named

IUPAC nomenclature

A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry ....

 2-hydroxyethylammonium (9Z)-octadecenoate, and has a structural formula

Structural formula

The structural formula of a chemical compound is a graphical representation of the molecular structure, showing how the atoms are arranged. The chemical bonding within the molecule is also shown, either explicitly or implicitly...

 [CH₃(CH₂)₇CH=CH(CH₂)₇CO₂][H₃NCH₂CH₂OH]. It is injected topically into varicosities to cause sclerosis

Sclerosis (medicine)

In medicine, sclerosis refers to the stiffening of a structure, usually caused by a replacement of the normal organ-specific tissue with connective tissue.Types include:...

(closure) of the abnormal vein.