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- W2023886434 abstract "The effect of 15 cyclodextrin derivatives (polar-electroneutral, cationic, anionic, and lipophilic) and of three 2-hydroxypropyldigitonins on the solubility of pancratistatin, an anticancer drug, was evaluated. The direct solubilizations into aqueous solutions were invariably low (0.1-1.2 mg/mL compared with 50 micrograms/mL in water). Complexes of pancratistatin with hydroxypropyl-beta-cyclodextrin were more stable (Kapp 153 M-1) than those with hydroxypropyl-gamma-cyclodextrin (Kapp 108 M-1). Acceptable preparations were made by dissolution of pancratistatin in a large excess (50x) of hydroxypropylcyclodextrin by ammonia and then freeze drying to ammonia-free preparations. In these preparations, both the inclusion and interdispersion phenomena were operative, and the preparations dissolved rapidly forming clear solutions of pancratistatin of concentrations up to 9 mg/mL. These solutions were oversaturated and while those based on hydroxypropyl-beta-cyclodextrin precipitated within 1 h; those based on hydroxypropyl-gamma-cyclodextrin were stable for at least 4 h when kept in a plastic container (i.e., time sufficient for potential use in parenteral preparations)." @default.
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- W2023886434 date "1991-04-01" @default.
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- W2023886434 title "Oversaturated Solutions of Drug in Hydroxypropylcyclodextrins: Parenteral Preparation of Pancratistatin" @default.
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- W2023886434 doi "https://doi.org/10.1002/jps.2600800421" @default.
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