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 (IC 50 = 0.53 μg/mL), T-24 (IC 50 = 7.94 μg/mL), QGY (IC 50 = 4.65 μg/mL) and Me180 (IC 50 = 6.89 μg/mL) cell lines while compound 2 was inactive. Compound 1 showed moderate inhibitory activity on QGY (IC 50 = 16.75 μg/mL) and Me180 (IC 50 = 5.84 μg/mL) cells. |