SEARCH Articles Figures Tables Anti-AIDS activity betulinic acid Betulin Betulinic acid (lupane triterpene Betulinic acid aspartic protease Betulinic acid cytotoxic activity Betulinic acid derivatives Betulinic acid derivatives as entry inhibitors Betulinic acid derivatives as maturation inhibitors Betulinic acid effects on aminopeptidase Betulinic acid from Betulinic acid structure Betulinic acid, anti-inflammatory activity Betulinic acid, oxidation Bifunctional betulinic acid derivatives Biotransformations betulinic acid Entry inhibitors, betulinic acid derivatives Of betulinic acid Pentacyclic triterpenes betulinic acid Succinyl betulinic acid Triterpene betulinic acid derivatives, as anti-HIV Triterpene betulinic acid derivatives, as anti-HIV agents