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Oleanolic acid or oleanic acid is a naturally occurring pentacyclic triterpenoid related to betulinic acid.
O 2286 (OTTO) Oleanolic acid, 99% Cas 508-02-1 - used as a reference compound during its quantification in the roots of Cissampelos pareria Linn.var hirsuta by high performance thin layer chromatography (HPTLC).