Leardkamolkarn Thongthep,
Suttiarporn, Kongkachuichai, Wongpornchai and Wanavijitr,
2011). The main secondary metabolites in black rice are the anthocyanins,
cyanidin-3-O-glucoside and peonidin-3-O-glucoside
which are localised in the pericarp and aleurone layers of the seeds
(Abdel-Aal, Young, & Rabalski, 2006).