Rearranged abietane diterpenoids from Clerodendrum mandarinorum.
Five new abietane derivatives which have a commonly rearranged abietane skeleton contained a 17(15-->16),18(4-->3)-diabeo-abietane framework, mandarones D-H, were isolated from the stem of Clerodendrum nmantarinorum Diels (Verbenaceae). The structures were characterized as (16S)-12,16-epoxy-11-hydroxy-17(15-->16), 18(4-->3)-diabeo-abieta-3,5,8,11,13-pentaene-7-one (mandarone D, 1), 12,16-epoxy-11,14-dihydroxy-17(15-->16),18(4-->3)-diabeo-abieta-3,5,8,11, 13,15-hexaene-7-one (mandarone E, 2), 12,16-epoxy-6,11,14-trihydroxy-17(15-->16),18(4-->3)-diabeo-abieta-3,5,8,11,13,15-hexaene-7-one (mandarone F, 3),12,16-epoxy-11,14-dihydroxy-6-methoxy-17(15-->16),18(4-->3)-diabeo-abieta-3,5,8,11,13,15-hexaene-2,7-dione (mandarone G, 4) and 12,16-epoxy-11,14-dihydroxy-17(15-->16),18(4-->3)-diabeo-abieta-3,5,8,11,13,15-hexaene-1,7-dione (mandarone H, 5) respectively, mainly based on the spectral analysis and by comparison with those of closely related compounds.
Department of Natural Pharmaceutical Chemistry, China Pharmaceutical University, Nanjing.
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Fan
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Min
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Iinuma
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Tanaka
D002845:Chromatography; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal; D006801:Humans; D019686:Lamiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry
D004224:Diterpenes; D004365:Drugs, Chinese Herbal