Ponsiri LiangsakulChutima KuhakarnSakchai HongthongSurawat JariyawatKanoknetr SuksenRadeekorn AkkarawongsapatJitra LimthongkulChanita NapaswadVichai ReutrakulKasetsart University, Kamphaeng Saen CampusMahidol University2019-08-232019-08-232018-01-01Natural Product Communications. Vol.13, No.1 (2018), 53-56155594751934578X2-s2.0-85048515502https://repository.li.mahidol.ac.th/handle/20.500.14594/44865© 2018 Natural Product Incorporation. All Rights Reserved. A new xanthone glycoside 1 together with four known flavonoid derivatives, astilbin (2), neoastilbin (3), isoastilbin (4), and epicatechin (5) were isolated from the ethyl acetate fraction partitioned from the methanol extract of the bark of Mammea harmandii. The chemical structures of all isolated compounds were established on the basis of their spectroscopic data. Compound 1 exhibited selective significant inhibitory activity in the anti-syncytium assay with an EC50 value of 11.44 M (SI = 14.03) while it was found inactive against HIV 1 reverse transcriptase as well as cytotoxic activity.Mahidol UniversityAgricultural and Biological SciencesMedicinePharmacology, Toxicology and PharmaceuticsArticleSCOPUS