5[K-.PSI.(CH2N)PR]-TASP AIDS-111800 AIDS111800 H-[Lys-.psi.(CH2N)-Pro-Arg]-Lys-[Arg-Pro-.psi.(CH2N)-Lys]-Lys-Lys-[Arg-Pro-.psi.(CH2N)-Lys]-Gly-Pro-Lys-[Arg-Pro-.psi.(CH2N)-Lys]-Glu-Lys-[Arg-Pro-.psi.(CH2N)-Lys]-Gly-Cys-OH Pseudopeptides