New glycosides from ajuga decumbens
A new phenethyl alcohol glycoside, galactosylmartynoside (1), and a new abietatriene-type diterpene glycoside, ajugaside A (2), were isolated from the whole plants of Ajuga decumbens, together with known phenethyl alcohol glycosides (3 and 4) and iridoid glycosides (5-7). Chemical structures were elucidated on the basis of spectral data. Of these compounds, 8-acetylharpagide (6) exhibited the strongest inhibitory effect on Epstein-Barr virus activation induced by 12-O-tetradecanoylphorbol-13-acetate.
Takasaki
M
Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan, and Faculty of Pharmacy, Meijo University, Yagotoyama, Tenpaku-ku, Nagoya 468-0077, Japan.
Yamauchi
I
Haruna
M
Konoshima
T