5(RK)-TASP AIDS-111798 AIDS111798 Lys[-(Lys-Arg-NH2)2]-Lys-Lys[-Lys-Arg-NH2]-Gly-Pro-Lys[-Lys-Arg-NH2]-Glu-Lys[-Lys-Arg-NH2]-Gly-Cys-OH Pseudopeptides