Abstract
A novel onoceranoid triterpene, named lamesticumin G (1) along with four known compounds (2–5) were isolated from the ethyl acetate extract of the fruit peels of Lansium parasiticum. The structure of lamesticumin G (1) was fully characterised using spectroscopic data. Lamesticumin G (1) inhibited α-glucosidase (maltase) with IC50 value of 2.27 mM, while 2–5 showed no inhibition.
Acknowledgements
TP is grateful to Nantaporn Surachaitanawat and Dr Rico Ramadhan for technical assistances. WW gratefully acknowledges the graduate School of Chulalongkorn University for a Postdoctoral Fellowship (Ratchadaphiseksomphot Endowment Fund).