(2-Aminobenzoyl)-Thr-Ile-Nle.psi.[COCH2]-(D or L)-2-Nal-Gln-Arg-NH2 AIDS-082209 AIDS082209 Abz-Thr-Ile-Nle.psi.[COCH2]-(D or L)-2-Nal-Gln-Arg-NH2