SCHEDULED MAINTENANCE
The n.m.r. spectrum of the β,γ-unsaturated lactone, prepared by the oxidation of methyl oleana-11,13(18)-dien-28-oate, supports the structure assigned by Spring et al., J. Chem. Soc., 1954, 1989; 1956, 1949, to the corresponding oxidation products derived from other triterpenes of the oleanane group.
R. A. Eade, G. Kornis and J. J. H. Simes, J. Chem. Soc. C, 1967, 441 DOI: 10.1039/J39670000441
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