期刊
JOURNAL OF NATURAL PRODUCTS
卷 70, 期 2, 页码 293-295出版社
AMER CHEMICAL SOC
DOI: 10.1021/np0680376
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The known (+)-trans-ozic acid (1) and two new labdane diterpenoids (2 and 3) have been isolated from an ethanol extract of Orthosiphon labiatus. The structures of 2 and 3 were established mainly by 1D and 2D NMR spectroscopic means. The ethanolic extract of Salvia africana-lutea afforded the known abietane diterpenoids carnosol (4), rosmadial (5), and carnosic acid (characterized as its derivative 6). Compounds 3 and 6 exhibited MICs of 157 and 28 mu M, respectively, against Mycobacterium tuberculosis, while 2 and 6 showed cytotoxic activity with IC50 82 and 69 mu M, respectively, against a breast (MCF-7) human cancer cell line.
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