The structures of two free triterpenoids, Y and Z, and two saponins, PH and PJ1, isolated from the fresh pericarps of Akebia quinata DECNE. (Lardizabalaceae) were investigated. Y, mp 317-320°, [α]D+62°, was identified with arjunolic acid (I), while Z, mp 303-305°, [α]D+75°, was assigned the structure 20 (29)-dehydro-30-norarjunolic acid (XII) and conventionally named norarjunolic acid. PH, mp 207-210°(decomp.), [α]D+3°, was defined as 28-O-α-L-rha·pyr-(1→4)-β-D-glc·pyr-(1→6)-β-D-glucopyranside (XIX) of XII, and PJ1 was characterized as 28-O-β-D-xyl·pyr-(1→3)-α-L-rha·pyr-(1→4)-β-D-glc·pyr-(1→6)-β-D-glucopyranoside (XXIV') of I. XXIV' is the first arjunolic acid oligoglycoside, and XII and XIX are second to eupteleogenin and eupteleoside, respectively, as a naturally occurring noroleanane derivative and its glycoside.
研究了从 Akebia quinata D
ECNE.(Lardizabalaceae)新鲜果皮中分离出的两种游离三
萜类化合物 Y 和 Z 以及两种
皂甙 PH 和 PJ1 的结构。(对从 Akebia quinata D
ECNE.Y,mp 317-320°,[α]D+62°,被确定为阿琼酸(I);Z,mp 303-305°,[α]D+75°,被确定为 20 (29)-dehydro-30-norarjunolic acid (XII),传统命名为 norarjunolic acid。PH,熔点 207-210°(d
EComp.PH,[α]D+3°,定义为 XII 的 28-O-α-L-rha-pyr-(1→4)-β-D-glc-pyr-(1→6)-β-
D-吡喃葡萄糖苷(XIX),PJ1 定性为 I 的 28-O-β-D-xyl-pyr-(1→3)-α-L-rha-pyr-(1→4)-β-D-glc-pyr-(1→6)-β-
D-吡喃葡萄糖苷(XXIV')。XXIV' 是第一种阿琼酸低聚糖苷,而 XII 和 XIX 分别是仅次于 eupteleogenin 和 eupteleoside 的天然存在的去甲乌头环衍
生物及其糖苷。