Studies on Nepalese Crude Drugs. XXVI. Chemical Constituents of Panch Aunle, the Roots of Dactylorhiza hatagirea D. DON.
作者:Haruhisa KIZU、Ei-ichi KANEKO、Tsuyoshi TOMIMORI
DOI:10.1248/cpb.47.1618
日期:——
From the dried roots of Dactylorhiza hatagirea, which are termed Panch Aunle in Nepal, five new compounds called dactylorhins A, B, C, D and E, and two new natural compounds named dactyloses A and B, have been isolated together with twelve known compounds. In addition to these compounds, two kinds of lipid mixture were also obtained.The structures of the new compounds have been determined by spectroscopic and chemical methods as follows : dactylorhin A, (2R)-2-β-D-glucopyranosyloxy-2-(2-methylpropyl)butanedioic acid bis(4-β-D-glucopyranosyloxybenzyl) ester; dectylorhin B, (2R, 3S)-2-β-D-glucopyranosyloxy-3-hydroxy-2-(2-methylpropyl)butanedioic acid bis(4-β-D-glucopyranosyloxybenzyl) ester; dactylorhin C, (2R)-2-β-D-glucopyranosyloxy-2-(2-methylpropyl)butanedioic acid; dactylorhin D, (2R, 3S)-2-β-D-glucopyranosyloxy-3-hydroxy-2-(2-methylpropyl)butanedioic acid 1-(4-β-D-glucopyranosyloxybenzyl) ester; dactylorhin E, (2R)-2-β-D-glucopyranosyloxy-2-(2-methylpropyl)butanedioic acid 1-(4-β-D-glucopyranosyloxybenzyl) ester; dactylose A, 1-deoxy-1-(4-hydroxyphenyl)-L-sorbose; dactylose B, 1-deoxy-1-(4-hydroxyphenyl)-L-tagatose.Although a mixture of dactyloses A and B has been already synthesized, this is the first example of their isolation from natural resources.Dactyloses A and B were suggested to be biosynthesized from L-ascorbic acid and 4-hydroxybenzyl alcohol via 2-C-(4-hydroxybenzyl)-α-L-xylo-3-ketohexulofuranosono-1, 4-lactone.
从被尼泊尔人称为 Panch Aunle 的 Dactylorhiza hatagirea 的干燥根中,分离出了五种新的化合物(dactylorhins A、B、C、D 和 E)和两种新的
天然化合物(dactyloses A 和 B),以及十二种已知化合物。除这些化合物外,还获得了两种脂质混合物。新化合物的结构已通过光谱和
化学方法确定如下:
右旋龙脑素 A,(2R)-2-β-
D-吡喃葡萄糖氧基-2-(
2-甲基丙基)
丁二酸双(4-β-
D-吡喃葡萄糖氧基
苄基)
酯;
右旋龙脑素 B,(2R, 3S)-2-β-
D-吡喃葡萄糖基
氧基-3-羟基-2-(
2-甲基丙基)
丁二酸双(4-β-
D-吡喃葡萄糖氧基
苄基)
酯;
右旋龙脑素 C,(2R)-2-β-
D-吡喃葡萄糖基
氧基-2-(
2-甲基丙基)
丁二酸;Dactylorhin D, (2R, 3S)-2-β-D-glucopyranosyloxy-3-hydroxy-2-(2-methylpropyl)butanedioic acid 1-(4-β-D-glucopyranosyloxybenzyl) ester;双
木糖 E,(2R)-2-β-
D-吡喃葡萄糖氧基-2-(
2-甲基丙基)
丁二酸 1-(4-β-
D-吡喃葡萄糖氧基
苄基)
酯;双
木糖 A,1-
脱氧-1-(
4-羟基
苯基)-
L-山梨糖;双
木糖 B,1-
脱氧-1-(
4-羟基
苯基)-
L-塔格糖。虽然已经合成了双链淀粉糖 A 和 B 的混合物,但这是从自然资源中分离出它们的第一个实例。双链淀粉糖 A 和 B 被认为是由 L-
抗坏血酸和
4-羟基苄醇通过 2-C-(
4-羟基
苄基)-α-L-
氧代-3-
酮基六
呋喃酮-1,4-内
酯生物合成的。