Cytotoxic heterocyclic triterpenoids derived from betulin and betulinic acid

URBAN, M., M. VLK, P. DŽUBÁK, M. HAJDÚCH, J. ŠAREK
Cytotoxic heterocyclic triterpenoids derived from betulin and betulinic acid. Bioorganic & Medicinal Chemistry. 2012, 20(11), 3666-3674, ISSN: 0968-0896, PMID: 22551630,