Wikipedia
Phenypressin
Phenypressin (Phe-Arg-vasopressin) is an oxytocin neuropeptide belonging to the vertebrae Vasopressin family. It belongs to some marsupials and has the poplypeptide sequence: Cys-Phe-Phe-Gln-Asn-Cys-Pro-Arg-Gly-NH2. It has also been found to be present is some species of eastern gray kangaroos.