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Constituents of labiatae-XIV1. Vierol and powerol, two new diterpenes from Sideritis canariensis

AuthorsGonzález, Antonio G.; Fraga, Braulio M. ; Hernández, Melchor G.; Luis, J. G.
Issue Date1973
CitationTetrahedron 29: pp. 561-563 (1973)
AbstractThe two new diterpenes, vierol, (1) [(-)kaurane-16a,18-diol] and powerol (3) [(-)kaurane-7B,16a-diol] have been isolated from Sideritis canariensis Ait. 1 was obtained by partial synthesis from epicandicandiol (7), and 3 was related with (-)kauranol (6) and (-)kauren-7B-oil acetate (11). Reduction of the acetoxy-aldehyde 14 by the method of Huang-Minlon and posterior acetylation gave 11, (-)isokauren-7B-ol-acetate (17) and (-)kauran-7B-ol acetqate (18).
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