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. XXI Century Hamlet reveals the details of his death. Hamlet is determined to avenge his father. During the performance of traveling artists an episode with a murder is added to the play "The Mousetrap", which infuriates Claudius. Hamlet kills the eavesdropping and scheming Polonius, after which he tries to send him away from the country, and to blow him up on the way while on the yacht, however, his entourage, Rosencrantz with Guildenstern, die instead. Hamlet also returns to Elsinore, where he attends the funeral of Ophelia. Laertes, conspired by Claudius, is ready to avenge his father and sister. The duel of