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Structure determination of kanglemeisu A by X-ray diffraction method.

G H Bao1, C H He, C F Xu

  • 1Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing.

Scientia Sinica. Series B, Chemical, Biological, Agricultural, Medical & Earth Sciences
|November 1, 1987
PubMed
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Kanglemeisu A, a novel compound from Chinese soil, was structurally elucidated. Its complex molecular architecture was determined using X-ray crystallography, revealing a unique arrangement of its chemical components.

Area of Science:

  • Natural Product Chemistry
  • Crystallography
  • Microbiology

Background:

  • Actinomyces species are a rich source of bioactive natural products.
  • Soil microorganisms from diverse geographical locations continue to yield novel chemical entities.
  • The isolation of Kanglemeisu A represents a new discovery from a Chinese soil sample.

Purpose of the Study:

  • To determine the precise three-dimensional structure of Kanglemeisu A.
  • To characterize the chemical composition and structural features of this novel compound.
  • To provide foundational data for potential future investigations into its biological activity.

Main Methods:

  • X-ray crystallography was employed for structural determination.
  • The RANTAN direct method was utilized to solve the crystal structure.

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  • Full matrix least squares refinement was performed to optimize atom coordinates and temperature factors.

    • Main Results:

    • Kanglemeisu A crystallizes in the triclinic system with space group P1.
    • The unit cell parameters were determined as a = 12.760(3), b = 10.287(2), c = 9.926(2) Å, with angles alpha = 88.39(2), beta = 78.64(2), gamma = 89.14(2).
    • The final discrepancy factor (R) was 0.0689, indicating a well-refined structure.

    Conclusions:

    • The complete molecular structure of Kanglemeisu A has been elucidated.
    • The structure comprises a naphthalene nucleus, a 17-membered ring, a dimethyl butane diacid moiety, and a beta-D-3,4-OO' methylenedigitoxose group.
    • This detailed structural information is crucial for understanding the compound's chemical properties and potential applications.