Sesquiterpene hydrocarbons comprised the major class of volatile components present and the juices had a characteristic aroma due to the presence of volatiles including β-caryophyllene, humulene, and α-copaene. In comparison with heated juices,Fresh pennywort juice and HPP-treated samples could retain more volatile compounds such as linalool and geraniol similar to those present in fresh juice, whereas some compounds such as α-terpinene and ketone class were induced by thermal treatment.