“…Chemical studies were performed on Eranthermum pulchelum in Denmark, 4) on P. latifolim in China, 5) on P. palatiferum [6][7][8] and P. carruthersii 9,10) in Vietnam to obtain different types of compounds, such as iridoid, steroid, triterpenoid, flavonoid, phenylethanoid, lignan and nitrogencontaining compounds.…”