AHYAR AHMAD and MUH. NASRUM MASSI, “THE ANTITUBERCULOSIS DRUG RIFAMPICIN IS ACTIVATED BY 2’, 5’-DIMETHYL BENZOPELARGONOLACTONE FROM THE LEAF OF Coleus atropurpureus L. BENTH”, ijpbs, vol. 5, no. 1, pp. 758–764, Mar. 2014.