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The **alstonia boonei crude alkaloid fraction** consists of the isolated alkaloid-rich extract from the stem bark of *Alstonia boonei*, a West African medicinal plant from the Apocynaceae family[2][5]. This fraction is prepared by selective extraction and subsequent purification of the alkaloid components, which are identified via LCMS/MS to include eleven distinct alkaloids[2]. It displays pharmacological activities, notably **antiobesity effects** primarily through **inhibition of pancreatic lipase** and **suppression of adipogenesis in preadipocytes**[2]. It also possesses **antioxidant activity** (although weaker than other fractions and ascorbic acid) attributed to the presence of alkaloids and related phytochemicals[1]. Minor antimicrobial and anti-inflammatory effects are attributed to similar plant fractions[4][3]. Usage of this extract is primarily for *in vitro* and experimental purposes; it is not approved as a pharmaceutical product for clinical use.
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