150840-69-0 AIDS-033486 AIDS033486 Betulinic acid NH-PrCONH-PenCOOH deriv. Hexanoic acid, 6-[[4-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]-1-oxobutyl]amino]- N'-[N-[3.beta.-Hydroxylup-20(29)-en-28-oyl]-4-aminobutanoyl]-6-aminohexanoic acid