A flavonoid alkaloid also known as a flavoalkaloid is a type of natural product produced by plants that contains both a flavonoid core structure and a nitrogen containing substituent so that the substance is also classified as an alkaloid. The most common flavonoid alkaloids contain a nitrogen heterocycle such as a pyridine or piperidine which is covalently bonded to the A-ring of a chromone. One flavonoid alkaloid, lilaline, was isolated from Lilium candidum in 1987.