Introduction
Nymphaea nouchali Burm. f. (Synonyms: Nymphaea stellata Willd) is an emergent aquatic macrophyte that is commonly known as blue waterlily [1]. This plant had long been used in the Ayurveda and Siddha systems of medicines [2]. Until now, floral part extract from this plant is still has various pharmaceutical applications, such as hepatoprotective [3], antihyperglycaemic [4], antihyperlipidaemic [5] and antidiabetic [6] activities to cure many diseases and disorders.