| Popis: |
Thirty-eight compounds were isolated from the roots and stem bark of Piptostigma fugax , besides three fractions of mixtures of homologues of two 6′-acylated sterol glucosides and fatty acids, respectively. Structures were determined by spectroscopic and chemical methods. Mixtures of homologues were analysed by GC-mass spectrometry after derivatization. 5α-Cycloart-24-ene-3β,16β,21-triol, 4-hydroxy-4,7-dimethyl-1-tetralone and three onychine-type alkaloids (2,7-dihydroxyonychine, 7-hydroxy-2-methoxyonychine and 7-hydroxy-2,8-dimethoxyonychine) represent new compounds. N -Methylheteropsine has been isolated as a natural product for the first time. |
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