Proprietary French quinquina in sweet (red) and less-sweet (blonde) varieties. Unquestionably, the most famous quinquina made. Called for in a variety of cocktails, one of them named for it: the Dubonnet Cocktail (which, for a time, Dubonnet also produced in a bottled form. Notable in the Blackthorn Cocktail.
Generally available. Produced and sold in France.