Iridoid, phenylethanoid and flavonoid glycosides from Forsythia suspensa.

Wei, Qian; Zhang, Rong; Wang, Qin; Yan, Xin Jia; Yu, Quan Wei; Yan, Fu Xia; Li, Chang; Pei, Yue Hu

As part of our continuing efforts to explore bioactive compounds from natural resources, a new iridoid glycoside, adoxosidic acid-6′-oleuroperic ester (1), together with one known phenylethanoid glycoside (2) and two known flavonoid glycosides (3–4) were isolated from the fruit of Forsythia suspensa. The structure of the new compound (1) was elucidated through 1D and 2D NMR spectroscopic data and HR-ESIMS. Interestingly, compound 1 was a monoterpene ester of one iridoid glycoside. Compounds 2–4 were identified as calceolarioside A (2), kaempferol-3-O-rutinoside (3), kampferol-3-O-robinobioside (4) on the basis of NMR spectroscopic data analyses and comparison with the data reported in the literature. The antiviral activity aganisist influenza A (H5N1) virus of compound 1 was studied as well.

FLAVONOID glycosides; BIOACTIVE compounds; NATURAL resources; DATA analysis; INFLUENZA

Natural Product Research, 2020, Vol 34, Issue 9, p1320

1478-6419

Academic Journal

10.1080/14786419.2018.1560288