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gnh antagonist peptide, pharmaceutical composition for inhibiting gonadotropin secretion in mammals, and intermediate for making a gnh antagonist peptide.
gnh antagonist peptide, pharmaceutical composition for inhibiting gonadotropin secretion in mammals, and intermediate for making a gnh antagonist peptide.
Peptides are provided which have improved duration of GnRH antagonistic properties. These antagonists may be used to regulate fertility and to treat steroid-dependent tumors and for other short-term and long-term treatment indications. These antagonists have a derivative of aminoPhe or its equivalent in the 5- or the 5- and 6-positions. This derivative is modified so as to contain a carbamoyl group or heterocycle, including a urea moiety, in its side chain. Decapeptides having the formula:wherein Q2 is Cbm or MeCbm and Xaa10 is D-Ala-ol or Ala-ol are particularly effective and continue to exhibit very substantial suppression of LH secretion at 96 hours following injection.
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