It has been confirmed that flavonoids in the leaves of Nelumbo nucifera Gaertn (lotus leaves) have many pharmacological activities. Currently, total flavones in the leaves of Nelumbo nucifera Gaertn have been studied extensively, however, only a few researches were able to investigate the individual components in it. At first, crude extract was obtained from lotus leaves by reflux extraction using 60% ethanol for three times. Then, the concentrated crude extract was separated on a D-101 column (eluted with 70% ethanol, and a polyamide column (s...