Flavanonol glycosides

Astilbin is a flavanonol, a type of flavonoid. Astilbin is the (2R-trans)-isomer; neoisoastilbin is the (2S-cis)-isomer and isoastilbin is the (2R-cis)-isomer.

Smitilbin is a flavanonol, a type of flavonoid. It is a rhamnoside that can be isolated in Smilax glabra (Chinaroot, sarsaparilla).