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Macrocarpane, a new sesquiterpene skeleton from the leaves of Porcelia macrocarpa

DOI: 10.1590/S0103-50532003000100004

Keywords: macrocarpane, spathulenol, steroids, sesquiterpenes, porcelia macrocarpa.

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Abstract:

the volatile oil and the hexane extract from the leaves of porcelia macrocarpa (warm.) r.e. fries, annonaceae, were submitted to chromatographic separations. nine sesquiterpenes (a-cubebene, a-copaene, germacrene-d, bicyclogermacrene, g-cadinene, d-cadinene, spathulenol, globulol and cis-cubenol) and one diterpene (phytol) were identified in the volatile oil (83.1 % in weight). two sesquiterpenes (spathulenol and macrocarp-11(15)-en-8-ol), the latter with a novel skeleton, one diterpene (phytol) and two steroids (sistosta-5,25-dien-3b-ol and sitosta-5,22,25-trien-3b-ol) were isolated from the hexane extract. these compounds were characterized by 1h and 13c nmr spectroscopy, including bidimensional analysis and mass spectrometry.

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