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 Freudian lens: as a reaction to the death of her hoped-for lover, her father. Ophelia is overwhelmed by having her unfulfilled love for him so abruptly terminated and drifts into the oblivion of insanity. In 1937, Tyrone Guthrie directed Laurence Olivier in a Jones-inspired "Hamlet" at The Old Vic. Olivier later used some of these same ideas in his 1948 film version of the play. In the 1950s, Lacan's structuralist theories about "Hamlet" were first presented in a series of seminars given in Paris and later published in "Desire and the Interpretation of Desire in "Hamlet"". Lacan postulated that the