Nelumbo nucifera GAERTN (commonly known as lotus), one of the most well known ornamental and economic perennial aquatic plants and now widely cultivated and consumed all over the world. Nelumbo nucifera leaves is a kind of naturals plant material used both in food and medicine field, involving nutrients and many biological activities. In order to further the study of biological activities of these aporphine alkaloids and to control the quality of this traditional Chinese cash crops and their products, bette...