Synonyms: 3-(Phenylalanine)-8-arginineoxytocin;8-L-Arginine-vasopressin;AVP;Arg8-vasopressin;Arginine antidiuretic hormone;Arginine-8-vasopressin;Arginine-vasopressin;1,2-Dithia-5,8,11,14,17-pentaazacycloeicosane-10-propionamide,19-amino-13-benzyl-7-(carbamoylmethyl)-4-[2-[[1-[(carbamoylmethyl)carbamoyl]-4-guanidinobutyl]carbamoyl]-1-pyrrolidinylcarbonyl]-16-p-hydroxybenzyl-6,9,12,15,18-pentaoxo-(6CI);