| 摘要 |
<p>5 and 7 residue peptides of formula: <IMAGE> wherein X is hydrogen, a protecting group or an amidino group, Y is hydrogen atom or a protecting group, A is a D-aminoacid, B and E are optionally substituted D or L aminoacid, C is Gly or Sar or a D or L amino acid, F is a valency bond or a Pro-Ser residue; and pharmaceutically acceptable salts thereof; are useful as analgesic, antipsychotic and neuroendocrinological agents.</p> |
