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 (1969 film) Hamlet (1969 film) Hamlet is a 1969 British film adaptation of Shakespeare's play "Hamlet", starring Nicol Williamson as Prince Hamlet. It was directed by Tony Richardson and based on his own stage production at the Roundhouse theater in London. The film also stars Anthony Hopkins as King Claudius, Judy Parfitt as Queen Gertrude, Marianne Faithfull as Ophelia, Mark Dignam as Polonius, Gordon Jackson as Horatio, and Michael Pennington as Laertes. The film, a departure from big-budget Hollywood renditions of classics, was made with a small budget and a very minimalist set, consisting of Renaissance fixtures and costumes in a dark,