Lemon juice (Citric Acid), Laurocerasus (Hydrocyanic Acid), Benzoin (Benzoic Acid), Chrysarobinum (Chrysophanic Acid), Rhus Toxicodendron (Toxicodendric Acid). Wild Cherry (see p. 462) and Bitter Almond (see p. 612), both of which yield Hydrocyanic Acid, have already been considered.