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苦木茎的化学成分

Chemical constituents from the stems of Picrasma quassioides Bennet

  • 摘要: 采用硅胶、ODS和凝胶等柱色谱方法对苦木(Picrasma quassioides Bennet)干燥茎的化学成分进行分离纯化,通过NMR、MS等波谱技术鉴定了17个化合物,包括6个β-咔巴啉类生物碱:1-methoxycarbonyl-β-carboline( 1 ),1-carbamoyl-β-carbolin( 2 ),4-methoxy-β-carboline-1-carboxylic acid methyl ester( 3 ),1-ethoxycarbonyl-β-carboline( 4 ),1-ethyl-β-carboline( 5 ),cordysinin C( 6 ),5个铁屎米-6-酮类生物碱:4,5-dimethoxycanthin-6-one( 7 ),11-hydroxycanthin-6-one( 8 ),5-hydroxycanthin-6-one( 9 ),5-hydroxy-4-methoxycanthin-6-one( 10 ),canthin-6-one( 11 );2个铁屎米-5,6-二酮类生物碱:3-methyl-4-methyoxycanthin-5,6-dione( 12 ),3-methylcanthin-5,6-dione( 13 );3个倍半萜类化合物:10α-hydroxycadin-4-en-al( 14 ),canangaterpenes III( 15 ),15-oxo-T-cadinol( 16 ),1个甾体类化合物androsta-1,4-diene-3,17-dione( 17 )。其中化合物 16 为新的天然产物,化合物 5614 ~ 17 为首次从苦木中分离鉴定。

     

    Abstract: The phytochemical studies on the stems of Picrasma quassioides Bennet led to the isolation of seven β-carboline alkaloids( 1 - 6 ), five cantin-6-one alkaloids( 7 - 11 ), two canthin-5, 6-dione( 12 , 13 ), three sesquiterpenes( 14 - 16 ), and one steroids( 17 ). Their structures were elucidated by the combination of spectroscopic analyses(ESI-MS, 1H NMR and 13C NMR)and the comparisons with the reference. Compound 16 is a new natural product, and this is the first report for compounds 5 , 6 , 14 - 17 from the species P. quassioides.

     

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