150840-87-2 AIDS-033535 AIDS033535 Betulinic acid, 11-aminoundecanoate deriv. N-[3.beta.-Hydroxy-30-pyrrolidinolup-20(29)-en-28-oyl]-11-aminoundecanoic acid Undecanoic acid, 11-[[(3.beta.)-3-hydroxy-28-oxo-30-(1-pyrrolidinyl)lup-20(29)-en-28-yl]amino]-