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Spivak A.Y.,Russian Academy of Sciences | Nedopekina D.A.,Russian Academy of Sciences | Shakurova E.R.,Russian Academy of Sciences | Khalitova R.R.,Russian Academy of Sciences | And 8 more authors.
Russian Chemical Bulletin

New derivatives of lupane triterpenoids, viz., 20,29-dihydrobetulinic and 3-epi-20,29-dihydrobetulinic acid derivatives containing triphenylphosphonium fragments as substituents were synthesized. These compound considerably exceed betulinic acid in antitumor activity. © 2013 Springer Science+Business Media New York. Source

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