Synonyms: Oxytocin,3-(L-phenylalanine)- (8CI); Oxytocin, 3-L-phenylalanine-;1,2-Dithia-5,8,11,14,17-pentaazacycloeicosane, cyclic peptide deriv.;3-Phenylalanine oxytocin; Glycinamide,L-cysteinyl-L-tyrosyl-L-phenylalanyl-L-glutaminyl-L-asparaginyl-L-cysteinyl-L-prolyl-L-leucyl-,cyclic (1®6)-disulfide; Vasopressin,8-L-leucine-