A new triterpenoid saponin from Glinus oppositifolius

Thuy Thanh Phana, Lien T. M. Doa, Trung Van Phungb, Thu Thi Hoai Nguyenc, Vinh N. Huynhd, Duong Thi Thuy Ngod, Kim Phi Phung Nguyend & Tuyet Thi Anh Nguyene*a Institute of Environment – Energy Technology, SaiGon University, Ho Chi Minh city, Vietnamb Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Ha Noi, Viet Namc University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnamd Department of Organic Chemistry, University of Science, National University, Ho Chi Minh City, Vietname Department of Chemistry, HCMC University of Education, Ho Chi Minh City, VietnamSupplemental data for this article can be accessed at https://doi.org/10.1080/14786419.2020.1774756.CONTACT Tuyet Thi Anh Nguyen tuyetnta@hcmue.edu.vnAbstractFrom the ethanol extract of Glinus oppositifolius, collected at Phu Yen province, Viet Nam, one new triterpenoid saponin (1) and four known compounds (2–5) were isolated. By means of NMR and HR-ESI-MS analyses, their structure was elucidated as 3-O-(β-D-xylopyranosyl-(1→3)-β-D-xylopyranosyl)spergulagenin A or glinusopposide V (1), glinusopposide L (2), spergulin B (3), vitexin (4) and astralagin (5). Two compounds (1–2) showed weak inhibitory activity against α-glucosidase.Graphical Abstract