(3R,4S)-N'-[N-3.beta.-Hydroxylup-20(29)-en-28-oyl]-8-aminooctanoyl]-4-amino-3-hydroxy-6-methylheptanoic acid 174847-98-4 AIDS-033640 AIDS033640 Betulinic acid NH-HepCONHPrCOOH deriv. Heptanoic acid, 3-hydroxy-4-[[8-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]-1-oxooctyl]amino]-6-methyl-, [R-(R*,S*)]- IC9564