Novel norcassane-type diterpene from the seed kernels of Caesalpinia crista

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• 作者：Banskota ; Arjun H. ; Attamimi ; Faisal ; Usia ; Tepy ; Linn ; Thein Zaw ; Tezuka ; Yasuhiro ; Kalauni ; Surya K. ; et. al.
• 刊名：Tetrahedron Letters
• 出版年：2003
• 出版时间：September 1, 2003
• 年：2003
• 卷：44
• 期：36
• 页码：6879-6882
• 全文大小：135 K

文摘

Three novel norcassane-type diterpenes were isolated from a CH₂Cl₂ extract of the seed kernels of Caesalpinia crista together with four known cassane-type diterpenes. All the new compounds represent unprecedented carbon framework. Norcaesalpinin A (<inter-ref locator-type=""sid"" locator=""S0040403903017222/1"">1</inter-ref>) and B (<inter-ref locator-type=""sid"" locator=""S0040403903017222/2"">2</inter-ref>) had 17-norcassane skeleton, while norcaesalpinin C (<inter-ref locator-type=""sid"" locator=""S0040403903017222/3"">3</inter-ref>) had 16-norcassane skeleton. Their structures were elucidated on the basis of spectral analysis.