H-Ser-Gln-Asn-Phe-(

SER-GLN-ASN-PHE-((R))-PRO-ILE-VAL-GLN

H-Ser-Gln-Asn-Phe-()-Pro-Ile-Val-Gln-OH

H-SER-GLN-ASN-PHE-(R)-PRO-ILE-VAL-GLN-OH

H-Ser-Gln-Asn-Phe-psi[CH2NH]-(R)-Pro-Ile-Val-Gln-OH