Our results obtained with dehulled seeds are
consistent with those obtained in this earlier study which investigated
bran extracts of seven Thai black rice varieties and found
that in three of the varieties quercetin-3-O-glucoside was present
in much higher quantities than isorhamnetin-3-O-glucoside. It is
important to point out that three isomers of apigenin-6/8-C-pentoside-
8/6-C-hexoside and two luteolin-6/8-C-arabinosyl-6/8-C-glucoside
isomers represent a major portion of the total flavone/
flavonol content of the rice.