Free/conjugated phenolic acids in white, red and black rice bran accounted for 41%, 65% and 85% of total
acids. Bound phenolic acids in rice bran accounted for 90% of total acids in whole grain. Cis-p-coumaric
was detected in bound form in bran while cis-sinapic acid was detected in the free/conjugated form in
embryo and bran. Cyanidin-3-O-glucoside and peonidin-3-O-glucoside were identified mainly in black
rice bran as the total anthocyanins. Cyanindin-3-O-rutinoside was also detected in black rice bran.