To search for secondary metabolites of Alnus hirsuta (Betulaceae), various chromatographic separations of the ethyl acetate soluble fraction of the stem bark of A. hirsuta led to the isolation of a new diarylheptanoid glycoside, (3R)-1,7-bis-(4-dihydroxyphenyl)-3-heptanol 3-O-β-D-glucopyranosyl(1→3)-β-D-xylopyranoside (13) and twelve diarylheptanoid derivatives, namely, oregonin (1), rubranoside A (2), hirsutanonol 5-O-β-D-glucopyranoside (3), rubranoside B (4), rubranoside C (5), hirsutanonol (6), hirsutenone (7), (5S)-O-methylhirsutanonol (8), platyphylloside (9), platyphyllonol 5-O-β-D-xylopyranoside (10), aceroside VII (11) and platyphyllenone (12). Isolates were assessed for their hepatoprotective effects against tert-butylhydroperoxide (t-BHP)-induced toxicity in HepG2 cells. Of these isolates, compounds 1—8 showed significant hepatoprotective effects on t-BHP-induced damage to HepG2 cells, with 8 exhibiting the greatest protective effect (50.7±3.7% at a concentration of 10 μM).
为了寻找桤木属植物糙皮桤木的次生代谢产物,对糙皮桤木树皮
乙酸乙酯可溶部分的多种色谱分离法导致了新二芳基
庚烷糖苷(3R)-1,7-双(4-二羟基苯基)-
3-庚醇3-O-β
-D-吡喃葡糖基(1→3)-β-
D-吡喃木糖苷(13)和十二个二芳基
庚烷衍
生物的分离,其中,分别为oregin(1)、rubranoside A(2)、hirsutanonol 5-O-β-D-
吡喃
葡糖苷(3)、rubranoside B(4)、rubranoside C(5)、hirsutanonol(6)、hirsutenone(7)、(5S)-O-甲基hirsutanonol(8)、platyphylloside(9)、platyphyllonol 5-O-β-
D-吡喃木糖苷(10)、aceroside VII(11)和platyphyllenone(12)。分离的化合物通过评估 HepG2 细胞中对抗
叔丁基过氧化氢(t-BHP)诱导的毒性来测试其肝保护作用。在这些分离的化合物中,化合物1—8对t-BHP诱导的HepG2细胞损伤有显著的保护作用,其中8的保护效果最好,在10 μM浓度下的保护效果为50.7±3.7%。