This invention provides new compounds of formula I, ##STR1## wherein R.sub.1, X, Y and Z are amino acid residues and each B is hyrogen or together are a bond, useful as growth hormone secretion inhibitors.
该发明提供了一些新的化合物,其
化学式为I,其中R1、X、Y和Z是
氨基酸残基,每个B是氢或一起是键,这些化合物可用作生长激素分泌
抑制剂。