| 摘要 |
New nonapeptides having the formula Prot Grp-R-Trp-Ser-Tyr-R2-Leu-Arg-Pro-Gly-R3; salts thereof; wherein R is Gln, Gln (bzl), His (bzl), Ser (bzl), Pro, Leu, Tyr (bzl), Ile, Cys (bzl) or Phe, R2 is D-Phe, D-Ala, D-Leu, D-Trp, D-Tyr, D-Tyr (Me), D-Ser, D-Met, D-Arg, D-Val, D-His, D-Gln, D-Phs, D-Thr, D-Pro or D-Asn and R3 is NH2, NH(lower alkyl) or N-(lower alkyl)2, methods for their production; certain peptide intermediates and their salts used in the production thereof; and the use of said nonapeptides as luteinizing hormone releasing factor antagonists.
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