Abstract
Three new triterpenoids, celastrusins A-C (1-3), together with 3-O-caffeoyl-α-amyrin (4) were isolated from the root bark of Celastrus orbiculatus. Their structures were identified by spectroscopic analysis, X-ray crystallography using Cu Kα radiation, and the comparison of both observed and reported spectroscopic data. An in vitro bioassay revealed that the caffeoyl triterpenoid esters 1, 3, and 4 possess neuroprotective effects against oxygen-glucose deprivation (OGD) induced SH-SY5Y cell damage. Further animal studies indicated that compound 1 significantly reduced brain infarction after transient middle cerebral artery occlusion (MCAO) in rats using a 10 mg/kg (i.v.) dose.
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