METHODS AND RESULTS: Two new abietane diterpenoids, yunnannin A (1) and Danshenol C (2), were isolated from Salvia yunnanensis together with ten known diterpenoids, danshenol A (3), przewalskin (4), tanshinone IIA, tanshinone I, crypotanshinone, 1,2-dihydrotanshinone, tanshinlactone, 5,6-dehydrosugiol, 12-hydroxy-6,7-seco-8,11,3-abietatriene-6,7-dial and phytol. Their structures were established based on spectroscopic data, chemical reactions and comparison with literature data. Compounds 1-3 were tested for their antitumor activity in T-24, QGY, K562, Me180 and BIU87 cell lines.
CONCLUSIONS:
Compound 3 showed inhibited growth of K562 (IC50 = 0.53 mu g/mL), T-24 (IC50 = 7.94 mu g/mL), QGY (IC50 = 4.65 mu g/mL) and Me180 (IC50 = 6.89 mu g/mL) cell lines while compound 2 was inactive. Compound 1 showed moderate inhibitory activity on QGY (IC50 = 16.75 mu g/mL) and Me180 (IC50 = 5.84 mu g/ mL) cells. |