SCHEDULED MAINTENANCE
Seven new triterpenoids from the heartwood of Guarea glabra are formulated as (1)–(5), (14), and (26) on the basis of chemical, spectroscopic, and X-ray evidence. All are based on the novel pentacyclic triterpane skeleton, (20S)-4,4,8β-trimethyl-14,18-cyclo-5α,13α,14α,17α-cholestane (16).
G. Ferguson, P. A. Gunn, W. C. Marsh, R. McCrindle, R. Restivo, J. D. Connolly, J. W. B. Fulke and M. S. Henderson, J. Chem. Soc., Perkin Trans. 1, 1975, 491 DOI: 10.1039/P19750000491
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