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The literature concerning the tetracyclic triterpene acids of elemi resin is confused. The acids have been reexamined by modern techniques and shown to be 3-oxotirucalla-8,24-dien-21-oic acid (IV),… (More)
7α,8α-Epoxytirucallane derivatives, including methyl 3α-acetoxy-7α,8α-epoxytirucall-24-en-21-oate (XXIV) have been prepared by a method involving oxidation of the 7,8-double bond of the corresponding… (More)