corey-pauling-koltun models of ( gly-7 ) deaminooxytocin , deaminotocinamide , and their respective retro-d-analogs built in any specific conformation ( e.g. , the walter-urry model for oxytocin ) have a quai-equivalent topochemical arrangement of amino-acid side chains ;
C0017890
gly
C0002520
amino-acid