150840-27-0 AIDS-033477 AIDS033477 Betulinic acid NH-PenCOOH deriv. Hexanoic acid, 6-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]- N-[3.beta.-Hydroxylup-20(29)-en-28-oyl]-6-aminohexanoic acid