W. Maneerat1, S. Tha-in1, S. Cheenpracha2, U. Prawat3 and S. Laphookhieo1*
1Natural Products Research Laboratory, School of Science, Mae Fah Luang University, Tasud, Muang, Chiang Rai 57100, Thailand.
2School of Science, University of Phayao, Maeka, Muang, Phayao 56000, Thailand.
3Department of Chemistry, Faculty of Science and Technology, Phuket Rajabhat University, Muang, Phuket 83000, Thailand.
Email: [email protected], [email protected]