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 to the common trinity of "maid, wife, or widow", with "whores" outside of that stereotype. In this analysis, the essence of "Hamlet" is the central character's changed perception of his mother as a whore because of her failure to remain faithful to Old Hamlet. In consequence, Hamlet loses his faith in all women, treating Ophelia as if she too were a whore and dishonest with Hamlet. Ophelia, by some critics, can be seen as honest and fair; however, it is virtually impossible to link these two traits, since 'fairness' is an outward trait, while 'honesty' is an inward trait. Carolyn