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saponin iv/leucemia
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5 risultati
Steroidal saponins from Dracaena surculosa.
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A phytochemical investigation of the whole plant of Dracaena surculosa resulted in the isolation of nine steroidal saponins, including three new bisdesmosidic spirostanol saponins, named surculosides A (1), B (2), and C (3), and a new bisdesmosidic furostanol saponin (4), which are based on
Oleanane-type saponins from Anemone taipaiensis and their cytotoxic activities.
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Phytochemical investigation of the n-BuOH extract of the rhizomes of Anemone taipaiensis led to the isolation of three new oleanane-type triterpenoid saponins (1-3), together with four known saponins (4-7). Their structures were elucidated on the basis of spectroscopic analysis and chemical
Synthesis of oleanolic acid saponins mimicking components of Chinese folk medicine Di Wu.
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3,28-Di-O-rhamnosylated oleanolic acid saponins, mimicking components of Chinese folk medicine Di Wu, have been designed and synthesized. One-pot glycosylation and 'inverse procedure' technologies have been applied thus significantly simplifying the preparation of desired saponins. The cytotoxic
Antineoplastic agents. 534. isolation and structure of sansevistatins 1 and 2 from the African Sansevieria ehrenbergii.
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Using bioactivity-directed isolation procedures, three new spirostanol saponins designated sansevierin A (1), sansevistatin 1 (2), and sansevistatin 2 (3) were isolated (10(-5) % yield) from the CH3OH-CH2Cl2 extract of Sansevieria ehrenbergii, accompanied by three known steroidal saponins (4-6). The
Cytotoxic triterpenoid saponins from the rhizomes of Anemone taipaiensis.
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Two new oleanane-type triterpenoid saponins, 1 and 2, and a new natural product, 3, together with five known saponins, 4- 8, were isolated from the rhizomes of ANEMONE TAIPAIENSIS. Their structures were elucidated by extensive spectroscopic analysis and chemical evidences. Six saponins, 1, 2, 4- 7,
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