The kernels of the apricot, Prunus armeniaca (Armeniaca vulgaris; P. tiliifolia) (Rosaceae), are used in Chinese medicine for disorders of the respiratory tract and for constipation. Apricot is a source of persic oil. Amygdalin, the major cyanogenic glycoside of apricot kernels, is the major constituent of laetrile. Apricot kernels are also a source of pangamic acid. Apricot fruits are used as a food.