174740-46-6 AIDS-033493 AIDS033493 Betulinic acid NH-HepCONHBuCOOH deriv. N'-[N-[3.beta.-Hydroxylup-20(29)-en-28-oyl]-8-aminooctanoyl]-5-aminopentanoic acid Pentanoic acid, 5-[[8-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]-1-oxooctyl]amino]-