Diterpenoids of Leonotis species. Part IV. Dubiin, a furanoid labdane derivative from L. dubia E. Mey
Abstract
The furanoid δ-lactone dubiin, C22H30O6, isolated from Leonotis dubia E. Mey, is identified as 6β-acetoxy-15,16-epoxy-9-hydroxylabda-13(16),14-dien-19,20-olactone (1).
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