Summary
Saurin, a sesquiterpene isolated fromSaussurea pulchella Fisch., has the composition C15H15O5 · 0.5 H2O. It It contains a γ-lactone ring, two hydroxy groups, two terminal methylene groups, and a keto group in a five-membered ring. Dehydrogenation with selenium gives chamazulene and, apparently, guaiazulene. Two possible structural formulas of saurin, (Ia) and (Ib), are proposed.
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References
O. Knessl and A. Vlastioorova, coll. 19, no. 4, 782, 1954; I. M. Hais and K. Macek, Handbuch der Papierchromatographie, vol. 1, 387, 1958.
F. Šorm, V. Benesová, and V. Herout, coll., 19, 357, 1954.
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Khimiya Prirodnykh Soedinenii, Vol. 2, No. 4, pp. 245–248, 1966
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Kushnir, L.E., Kuzovkov, A.D. Study of the structure of saurin, a sesquiterpene lactone fromSaussurea pulchella . Chem Nat Compd 2, 197–199 (1966). https://doi.org/10.1007/BF00564088
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DOI: https://doi.org/10.1007/BF00564088