Pentols

thumb|right|class=skin-invert-image|UV visible spectrum of quercetin, with lambda max at 369 nm

chemical compound

Patuletin is an O-methylated flavonol. It can be found in the genus Eriocaulon.

Mearnsetin is an O-methylated flavonol. It can be found in Eucalyptus globulus and in Elaeocarpus lanceofolius. The compound has antioxidative properties.

Herbacetin is a flavonol, a type of flavonoid.

Tricetinidin is an intense red-colored chemical compound belonging to the 3-deoxyanthocyanidins. It can be found in black tea infusions. Tricetinidin, in tea, would be a product of the oxidative degallation of epigallocatechin gallate (EGCG).

Tricetin is a flavone, a type of flavonoid. It is a rare aglycone found in the pollen of members of the Myrtaceae, subfamily Leptospermoideae, such as Eucalyptus globulus. This compound shows anticancer effects on human breast adenocarcinoma MCF-7 cells. Moreover. a potent anti-inflammatory effect of tricetin has also been demonstrated in a model of acute pancreatitis. This observation was explained by the compound's radical scavenging effects, its inhibitory effect on the DNA damage sensor enzyme poly (ADP-ribose) polymerase-1 (PARP1) and PARP1-mediated cell death and suppression of inflammat

Annulatin is an O-methylated flavonol found in the roots of Pteroxygonum giraldii.

Hypolaetin is a flavone. It is the aglycone of hypolaetin 8-glucuronide, a compound found in the liverwort Marchantia berteroana. Hypolaetin 8-glucoside can be found in Sideritis leucantha.

'5-O-Methylmyricetin' is an O-methylated flavonol, a type of flavonoid. It is the 5-O-methyl derivative of myricetin. It occurs naturally and can also be synthesized.

Eupalin is a flavonol. It is the eupalitin 3-O-rhamnoside. It can be isolated from Eupatorium ligustrinum.

Pentahydroxybenzene (C6H6O5) is a chemical compound whose structure consists of a benzene ring with five hydroxy groups (–OH) as substituents. The compound forms white to pinkish crystals. It decomposes at 264–269 °C.

Europetin is an O-methylated flavonol. It can be found in Plumbago europaea and it can be prepared synthetically.