J Agric Food Chem. 2001 Sep;49(9):4478-81.
Flavonol glycosides and novel iridoid glycoside from the leaves of Morinda citrifolia.
Sang S, Cheng X, Zhu N, Stark RE, Badmaev V, Ghai G, Rosen RT, Ho CT.
Department of Food Science and Center for Advanced Food Technology, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901-8520, USA.
One new iridoid glycoside and five known flavonol glycosides have been isolated from the leaves of Morinda citrifolia. The new iridoid exists as an epimeric mixture in solution. Complete assignments of the proton and carbon chemical shifts for the individual epimers were accomplished on the basis of high-resolution 1D and 2D NMR data. Their antioxidative activities were measured. All of these compounds showed DPPH free radical scavenging activity at the concentration of 30 microM.
PMID: 11559157 [PubMed - indexed for MEDLINE]