11-[[[3.beta.-Hydroxylup-20(29)-en-28-oyl]methyl]amino]aminoundecanoic acid 173106-54-2 AIDS-033541 AIDS033541 Betulinic acid, 11-aminoundecanoate deriv. Undecanoic acid, 11-[[(3.beta.)-3-hydroxylup-20(29)-en-28-yl]amino]-