Ruta graveolens the isolation of the furanocoumarin chalepensin. The essential oil of "R. graveolens" contains two main constituents, undecan-2-one (46.8%) and nonan-2-one (18.8%). The bitter taste of its leaves led to rue being associated with the (etymologically unrelated) verb "rue" "to regret". Rue is well known for its symbolic meaning of regret and it has sometimes been called "herb-of-grace" in literary works. It is one of the flowers distributed by the mad Ophelia in William Shakespeare's "Hamlet" (IV.5): It was planted by the gardener in "Richard II" to mark the spot where the Queen wept upon hearing news of Richard's capture (III.4.104–105):
Hamlet (1948 film) of the play, broadcast on the program "Theatre Guild on the Air". Gielgud also followed the lead of Olivier's film version by giving the final lines of the play to Horatio instead of to Fortinbras. Olivier also played up the Oedipal overtones of the play by having Hamlet kiss his mother lovingly on the lips several times during the film. Film scholar Jack Jorgens has commented that "Hamlet's scenes with the Queen in her low-cut gowns are virtually love scenes." In contrast, Jean Simmons' Ophelia is destroyed by Hamlet's treatment of her in the nunnery scene. According to J. Lawrence