Identity of Lespedin with Kaempferitrin

Abstract

FROM the leaves of Lespedeza cyrtobotrya Miquel, a deciduous shrub of the natural family Leguminosæ, M. Hasegawa and I isolated a kæmpferol glycoside which we named lespedin1,2, its structure being shown to be kæmpferol 3,7-dirhamnoside. It has also been isolated from Celastrus orbiculatus Thunberg (family Celastraceæ) by M. Kanao and M. Shimokoriyama3. When crystallized from water, lespedin had melting point 195° with or without water of crystallization (3½H2O), whereas from ethanol it melted at 234°. It thus appeared to be different from kæmpferitrin, melting point 201–203° 4.

References

  1. 1

    Hattori, S., and Hasegawa, M., Proc. Imp. Acad. (Tokyo), 16, 9 (1940).

  2. 2

    Hasegawa, M., Acta Phytochim., 11, 299 (1940).

  3. 3

    Kanao, M., and Shimokoriyama, M., Acta Phytochim., 15, 229 (1949).

  4. 4

    Perkin, A. G., J. Chem. Soc., 91, 433 (1907).

  5. 5

    Bate-Smith, E. C., and Westall, R. G., Biochim. et Biophys. Acta, 4, 427 (1950).

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HATTORI, S. Identity of Lespedin with Kaempferitrin. Nature 168, 788 (1951). https://doi.org/10.1038/168788a0

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