173106-48-4 AIDS-033540 AIDS033540 Betulinic acid, 11-ureidodecanoate deriv. Decanoic acid, 10-[[[[(3.beta.)-3-hydroxy-28-norlup-20(29)-en-17-yl]amino]carbonyl]amino]- N-[3.beta.-Hydroxy-28-norlup-20(29)-en-28-oyl]-11-aminoundecanoic acid