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 not been without objection from some critics. Ophelia has also been defended by feminist critics, most notably Elaine Showalter. Ophelia is surrounded by powerful men: her father, brother, and Hamlet. All three disappear: Laertes leaves, Hamlet abandons her, and Polonius dies. Conventional theories had argued that without these three powerful men making decisions for her, Ophelia is driven into madness. Feminist theorists argue that she goes mad with guilt because, when Hamlet kills her father, he has fulfilled her sexual desire to have Hamlet kill her father so they can be together. Showalter points out that Ophelia has become the