Flavonol glycosides and novel iridoid glycoside from the leaves of Morindacitrifolia

One new iridoid glycoside and five known flavonol glycosides have been isol ated from the leaves of Morinda citrifolia. The new iridoid exists as an ep imeric mixture in solution. Complete assignments of the proton and carbon c hemical shifts for the individual epimers were accomplished on the basis of high-resolution 1D and 2D NMR data. Their antioxidative activities were me asured. All of these compounds showed DPPH free radical scavenging activity at the concentration of 30 muM.