An optimized microwave-assisted extraction method for increasing the yields of rare ginsenosides from Panax quinquefolius L

Rare ginsenosides in Panax quinquefolius L. are proved to have stronger bioactivities. The fact that it is hard to obtain large amounts of rare ginsenosides seriously restricts further researches of rare ginsenosides. An easy, fast and efficient method to obtain amounts of different kinds of rare ginsenosides at one time and to quantify precisely of each one is in great need.