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 is systematically named 2-hydroxyethylammonium (9Z)-octadecenoate and has a structural formula [CH3(CH2)7CH=CH(CH2)7CO2][H3NCH2CH2OH]. It is injected topically into varicosities to cause sclerosis (closure) of the abnormal vein.
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