Scheme 1From: Synthesis of acyl oleanolic acid-uracil conjugates and their anti-tumor activitySynthesis of acyl oleanolic acid derivatives. Reagents and conditions: (i) anhydride, DMAP, anhydrous CH2Cl2/pyridine, rt (64–89%); (ii) acyl chloride, Et3N, anhydrous THF, rt (75–88%)Back to article page