Betulin, betulinic acid and their derived compounds are important pentacyclic lupane-type triterpenoids and
exhibit diversified pharmacological activities like anti-HIV, antitumor, antimycotic, anti-inflammatory, antioxidant and
immunomodulatory activities. Many new methods for the synthesis of potentially valuable betulin derived triterpenoids
with potent bioactivity have been largely reported in the past few years. In this review, we will present the progress made
on the synthesis of novel structural triterpenoids with excellent chemical or biological activity that have appeared from
2006 to 2012.
Keywords: Betulin, betulinic acid, heterocyclic derivatives, biological activity, synthetic method.
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