The invention relates to PYY compounds with the amino acid modifications 7Lys, 30Trp, and 31Leu, and in addition to these, 22Ile and/or 28Tyr, and derivatives thereof. The compounds of the invention are selective Y2 receptor agonists. The invention also relates to pharmaceutical compositions comprising such PYY compounds and pharmaceutically acceptable excipients, as well as the medical use of the PYY compounds.本發明係關於具有胺基酸修飾7Lys、30Trp、與31Leu、以及除此等之外22Ile及/或28Tyr的PYY化合物、其衍生物。本發明之化合物係選擇性Y2受體促效劑。本發明亦係關於包含如此PYY化合物與醫藥上可接受的賦形劑的醫藥組成物、以及該等PYY化合物之醫藥用途。