Further Studies on the Structure of Retigeranic Acid
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概要
- 論文の詳細を見る
Retigeranic acid, C_<25>H_<38>O_2,a sesterterpene isolated from the lichen, Lobaria retigera group, L. isidiosa VAIN. var. subisidiosa ASAH., was separated by high performance liquid chromatography into two components, retigeranic acid A (minor) (1) and B (major) (2). Crystals of both components were subjected to X-ray crystallographic analysis. The crystal parameters are monoclinic space group P2_1,Z=4 with a=24.10(3), b=12.86(1), c=7.412(9) Å, β=96.5(1)° for 1 and a=24.067(17), b=12.614(9), c=7.457(5) Å, β=96.30(7)° for 2.Retigeranic acids A and B were proved to be S and R stereoisomers at C-18,respectively. The absolute configurations of other parts of the structure of retigeranic acids are assumed to be identical, as they have previously been determined by the X-ray anomalous dispersion method on the p-bromoanilide derived from native retigeranic acid.
- 公益社団法人日本薬学会の論文
- 1991-11-25
著者
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柴田 承二
Shibata Laboratory of Natural Medicinal Materials
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柴田 承二
Shibata Laboratory Of Natural Medicinal Materials C
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IITAKA YOICHI
Faculty of Pharmaceutical Sciences, Univesity of Tokyo
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Iitaka Yoichi
Faculty Of Pharmaceutical Sciences University Of Tokyo:(present Address)nishi-tokyo University
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Iitaka Yoichi
Faculty Of Medicine Teikyo University
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菅原 はるみ
Faculty of Pharmaceutical Sciences, University of Tokyo
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柏谷 敦
Faculty of Pharmaceutical Sciences, University of Tokyo
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柏谷 敦
Faculty Of Pharmaceutical Sciences University Of Tokyo
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菅原 はるみ
Faculty Of Pharmaceutical Sciences University Of Tokyo
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