Pyranochromenes

Tephrosin is rotenoid. It is a natural fish poison found in the leaves and seeds of Tephrosia purpurea and T. vogelii.

Karanjachromene is a pyranoflavonol, a type of flavonol. It is a fluorescent pyranoflavonoid isolated from the seed oil of Millettia pinnata.

Visnadine (or visnadin) is a natural vasodilator. It was first isolated from bishop's weed (Ammi visnaga), a plant indigenous to the Mediterranean region which has been used for centuries in Egypt as a spasmolytic.