Synthesis and cytotoxicity of 28-carboxymethoxy lupane triterpenoids. Preference of 28-O-acylation over 28-O-alkylation of betulin by ethyl bromoacetate
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A. Koohang | M. Flavin | A. Mar | Ze-Qi Xu | D. Eiznhamer | N. Majewski | E. Szotek | Nathan D. Majewski