I, N., S, H., A. Hadi, H. and Awang, K. (2002) “Ab initia Geometry-Optimization and NMR Studies of Chemical Constituents of Piper sarmentosum”, Malaysian Journal of Science, 21(1&2), pp. 143–147. Available at: http://ojie.um.edu.my/index.php/MJS/article/view/8600 (Accessed: 21 November 2024).