Pinocembrin is a flavanone, a type of flavonoid. It is an antioxidant found in honey and propolis. It can be further biosynthetized to pinobanksin, by hydroxylating the C ring. Structure and Chemical Properties The central foundation of pinocembrin is composed of a double ring structure. Functional groups include 3 hydroxy groups, a phenyl ring, a ketone. (External Link)… (More on Pinocembrin)