<p>
The important role of active compounds from natural products
from various sources especially derived from plants, has been
confirmed from the folk medicine to modern medicine. Their effects
are not only used directly as a folk medicine but as a prototype or an
inportant role for the discovery and development of new drugs.
Vietnam is rich a country in medicinal resources, which has a high
potential of medicinal plants and has a lot of experience using this
source of medication by its long tradition of medicine. According to
Dictionary of Vietnamese medicinal plants, in Vietnam, there were
13000 species, in which 5000 species were used to folk medicine.
This is the suggestions for us to study this source of medicine for the
life. In the course of screening program of extracts from Vietnam
medicinal plants with cytotoxic and anti-inflammatory activities, the
methanolic extract of the tubers of O. japonicus showed significant
cytotoxic and anti-inflammatory effects and was chosen for further in
continuing studies of this thesis
</p>
