144334-53-2 3-Phe-4-asn-8-val-oxytocin Oxytocin, phe(3)-asn(4)-val(8)- Oxytocin, phenylalanyl(3)-asparaginyl(4)-valyl(8)- Phasvatocin Vasopressin, 4-L-asparagine-8-L-valine-