The structure and stereochemistry of microlenin, a novel antitumour sesquiterpene lactone isolated from Helenium microcephalum, have been established from spectral and single-crystal X-ray analyses.
K. Lee, Y. Imakura and D. Sims, J. Chem. Soc., Chem. Commun., 1976, 341 DOI: 10.1039/C39760000341
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