Latex of Garcinia cowa

To the best of our knowledge, garcinone D, fuscaxanthone I and parvifoliol F were first reported as components of Garcinia cowa. Four isolated xanthones were investigated for antioxidant activities through the extent of their abilities to scavenge the ABTS·+ radical cation. The result showed that compounds 1 and 2 exhibited potent antioxidant activities with IC50 values of 74.45 ± 8.89 µM and 64.56 ± 4.51 µM, respectively.

10p nguaconbaynhay11 01-04-2021 9 2   Download

Seven tetraoxygenated xanthones, namely fuscaxanthone A, 7-O-methylgarcinone E, cowagarcinone A, cowaxanthone, rubraxanthone, cowanin and cowanol, were isolated from the dichloromethane extract of the latex of Garcinia cowa Roxb. ex Choisy. Their structures were elucidated on the basis of 1D, 2D NMR spectroscopic data and compared with reported data. This is the first time the chemical constituents of Garcinia cowa Roxb. ex Choisy have been investigated in Vietnam.

7p abcxyz123_02 03-03-2020 16 1   Download