173106-43-9 AIDS-033538 AIDS033538 Betulinic acid, 11-aminoundecanoate deriv. N-[3.beta.-Hydroxy-30-aminolup-20(29)-en-28-oyl]-11-aminoundecanoic acid Undecanoic acid, 11-[[(3.beta.)-30-amino-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]-