[Preparation of 23-hydroxybetulinic acid from the roots of Pulsatilla chinensis].

Objective: To isolate and purify high purity 23-hydroxybetulinic acid from the roots of Pulsatilla chinensis.

Methods: By acid hydrolysis, silica gel column chromatographies and recrystalization methods, 23-hydroxybetulinic acid was obtained from the roots of P. chinensis.