Endophytic fungi colonizing plants produce a wide variety of compounds, possibly because the plant environment stimulates them to synthesize bioactive compounds in order to adapt or be of benefit to their hosts, and hence they have been considered an excellent source for the discovery of novel secondary metabolites.1,2 Thailand, which is located in a tropical zone, has high biodiversity, especially in plants, and thus is one of the promising countries for obtaining endophytes. As some of the biological activity of the plants used for medicinal purposes might be attributed to the microbes inhabiting the plants, particular attention has been paid to the endophytes, and consequently several novel compounds have been obtained.3–6