The crystal structure of a conformational isomer of teucrin P1 from Teucrium gnaphalodes.
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概要
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The crystal structure of an isomer of Teucrin P<SUB>1</SUB> isolated from <I>Teucrium gnaphalodes</I> has been determined by the X-ray method. Crystal data: orthorhombic, <I>P</I>2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB>, <I>a</I>=13.849(4), <I>b</I>=15.545(3), <I>c</I>=7.896(2) Å, <I>Z</I>=4. The final <I>R</I> value is 0.048 for 1247 observed reflections with <I>F</I><SUB>o</SUB>>2σ(<I>F</I><SUB>o</SUB>). The structure is disordered, and two kinds of components (molecules) with different conformations coexist in the crystal. The major component exists with a probability of 0.74, while the minor one with 0.26. A tetrahydropyran ring in the former takes a boat form, while the latter a chair form, indicating that in this complex fused-ring system a boat form of the tetrahydropyran ring is more stable than a chair one. The conformation of the major component is the same as that of naturally occurring Teucrin P<SUB>1</SUB>, apart from the orientation of a furan ring.
- 公益社団法人 日本化学会の論文
著者
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Nakanishi Koji
Suntory Institute For Bioorganic Research
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Kato Natsuki
Department Of Agricultural Chemistry Nagoya University
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Iwashita Takashi
Suntory Inst. For Bioorganic Res. Osaka Jpn
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Morita Masaya
Department Of Chemistry Biology And Marine Sciences University Of The Ryukyus
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Ashida Tamaichi
Department Of Biotechnology School Of Engineering Nagoya University
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Yamane Takashi
Department of Applied Chemistry and Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University
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Yamane Takashi
Department of Applied Chemistry, Nagoya University
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Zheng Zeyong
Department of Applied Chemistry, Nagoya University
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Ashida Tamaichi
Department of Applied Chemistry and Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University
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Morita Masaya
Department of Agricultural Chemistry, Nagoya University
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