Oxidative lactonization of oleanane and ursane acids by treating with ozone.Published in:Russian Journal of Organic Chemistry, 2015, v. 51, n. 2, p. 261, doi. 10.1134/S1070428015020219By:Husnutdinova, E.;Lobov, A.;Kukovinets, O.;Kataev, V.;Kazakova, O.Publication type:Article