**4.5 Flavonol**

Several type of flavonol were reported from parts of plants as myricetin 3-O-(2″,4″-di-O-acetyl)-α-L-rhamnopyranoside from *Myrsine Africana* [82], flavonoid glycoside named as 3'-*O*-methyl quercetin-3-glucose-6-gallic acid from *Cordia oblique* leaves [83], 2-(3, 4-dihydroxyphenyl)-3, 5, 7-trihydroxy-4H-chromen-4-one

**Figure 9.** *Diverse structure of isoflavonoids from plants species.*

**Figure 10.** *Several different structures of flavonol isolated from parts of plant species.*

from aerial parts of *Chenopodium album* [84], amurensin and cosmosiin from *Trigonella foenum graecum* [85], rhamnosides flavonol, kaempferol-3-*O*-rhamnoside and quercetin-3-*O*-rhamnoside from leaves of *Pometia pinnata* [86] and a new flavonol glycoside, sabiapside A from *Sabia parviflora* [87] (**Figure 10**).
