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Flekhter, O.B., Boreko, E.I., Nigmatullina, L.R. et al. Synthesis and Pharmacological Activity of Acylated Betulonic Acid Oxides and 28-Oxo-Allobetulone. Pharmaceutical Chemistry Journal 38, 148–152 (2004). https://doi.org/10.1023/B:PHAC.0000034305.96047.87
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DOI: https://doi.org/10.1023/B:PHAC.0000034305.96047.87