(3R,S)-N'-[N-3.beta.-Hydroxylup-20(29)-en-28-oyl]-8-aminooctanoyl]-4-amino-3-hydroxybutyric acid 174740-56-8 AIDS-033514 AIDS033514 Betulinic acid NH-HepCONHPrCOOH deriv. Butanoic acid, 3-hydroxy-4-[[8-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]-1-oxooctyl]amino]-