Orientin is a flavone, a chemical flavonoid-like compound. It is the 8-C glucoside of luteolin.
Orientin is found in Adonis vernalis, in Anadenanthera colubrina and Anadenanthera peregrina, and in the Phyllostachys nigra bamboo leaves
Orientin is also reported in the passion flower, the Açaàpalm, buckwheat sprouts, and in millets.
The identification of orientin has been reported widely. Its identification using mass spectrometry is established.
Isoorientin (or homoorientin) is the luteolin-6-C-glucoside.