The structures of two new germacra-cis-1(10),cis-4-dien-trans-6α, 12-olides, longicornin A from Melampodium longicorne and melrosin A from M. rosei, have been determined by single crystal X-ray analysis; configurational revisions of the structurally related melcanthins A—G are suggested.
N. H. Fischer, A. J. Malcolm, E. J. Olivier, F. R. Fronczek, T. J. Delord and S. F. Watkins, J. Chem. Soc., Chem. Commun., 1982, 1243 DOI: 10.1039/C39820001243
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