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- W1988499333 abstract "The crystal structures of bromogaillardin and deacetyldihydrogaillardin p-bromobenzoate have been determined, and the results define the stereochemistry of gaillardin, a cytotoxic sesquiterpenoid lactone from Gaillardia pulchella. The atomic co-ordinates were determined by Fourier and least-squares methods, and the absolute configuration was established by the anomalous-dispersion effect. Each derivative has a cycloheptene ring in a chair conformation and a cyclopentane ring in an envelope conformation. The γ-lactone ring in bromogaillardin has an exocyclic methylene group at C(11) and is notably less puckered than the γ-lactone ring in the dihydro-derivative which has a methyl group at C(11)." @default.
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- W1988499333 date "1971-01-01" @default.
- W1988499333 modified "2023-09-26" @default.
- W1988499333 title "Sesquiterpenoids. Part XII. Stereochemistry of gaillardin: crystal and molecular structures of bromogaillardin and deacetyldihydrogaillardin p-bromobenzoate" @default.
- W1988499333 doi "https://doi.org/10.1039/j29710001399" @default.
- W1988499333 hasPublicationYear "1971" @default.
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