Chemical investigation of a lipophilic CHCl3 extract of the dried fruits of Barringtonia racemosa resulted in the isolation of two unusual monoacylated polyhydroxy oleanane triterpenoid congeners named racemosols C-D (1-2) along with three known compounds. Their structures were determined by comprehensive spectroscopic analysis coupled with chemical modifications as 2 beta-acetoxy-3 beta, 16 alpha,22 alpha,28-tetrahydroxyolean-12-ene (1) and 22 alpha-(2-methylbutyryl)-3 beta, 15 alpha,16 alpha,21 beta,28-pentahydroxyolean-12-ene (2). Compounds (1-3, 1a, and 2a) were subjected to alpha-glucosidase inhibitory assay and 1 showed the most potent alpha-glucosidase inhibition with an IC50 value of 5.6 mu M. (C) 2015 Elsevier Ltd. All rights reserved.