5(RPK)-TASP AIDS-111789 AIDS111789 Lys[-(Lys-Pro-Arg-NH2)2]-Lys-Lys[-Lys-Pro-Arg-NH2]-Gly-Pro-Lys[-Lys-Pro-Arg-NH2]-Glu-Lys[-Lys-Pro-Arg-NH2]-Gly-Cys-OH Pseudopeptides