Complexation between oleanolic and maslinic acids with native and modified cyclodextrins

•CDs improve the aqueous solubility of OA and MA.•OA and MA are complexed by β-, γ-, HP-β- or HP-γ-CDs.•The encapsulation of MA with γ-CDs has the highest complexation strength.•The encapsulation of OA with γ-CDs presents the highest complexation efficiency.•The pH and temperature affect to the complexation process of OA and MA.