Origin of quercetin
Examples from the Web for quercetin
Apples contain an anti-inflammatory flavonoid called quercetin, while red wine contains the flavonoid catechin.
A very minute proportion of quercetin, a principle yielded by quercitron bark, has been obtained from catechu.
It contains two coloring principles, quercetrin and quercetin.Principles and Practice of Fur Dressing and Fur Dyeing|William E. Austin