“…4 H ‐chromen‐4‐one makes up flavone, which is a plant‐derived secondary metabolite. Because the 4 H ‐chromen‐4‐one skeleton is known to exhibit anticancer effects, diverse derivatives have been reported . 3,5,4′‐Trihydroxy‐trans‐stilbene, resveratrol, is widely present in berries and grapes .…”