150840-81-6 AIDS-033494 AIDS033494 Betulinic acid NH-HepNHCOCH2COOH deriv. N'-[N-3.beta.-Hydroxylup-20(29)-en-28-oyl]-7-aminoheptyl]carbamoyl]acetic acid Propanoic acid, 3-[[7-[[(3.beta.)-3-hydroxy-28-oxolup-20(29)-en-28-yl]amino]heptyl]amino]-3-oxo-