[摘要]:Bioassay guided fractionation of the ethanolic extract of Polyalthia longifolia var. pendula, led to the discovery of the clerodane diterpene, 16 alpha-hydroxycleroda-3, 13 (14) Z-dien-15, 16-olide (1), as a new structural class of HMG-CoA reductase inhibitor. Importantly, the in vivo effects of 1 corroborated well with its molecular docking analysis and also with its hamster plasma pharmacokinetics. (C) 2011 Elsevier Masson SAS. All rights reserved.