Chemoprevention of colon carcinogenesis by oleanolic acid and its analog in male F344 rats and modulation of COX-2 and apoptosis in human colon HT-29 cancer cells. - Janakiram,N.B.; Indranie,C.; Malisetty,S.V.; Jagan,P.; Steele,V.E.; Rao,C.V. (Pharm Res, 2008)