1-PT-Oxytocin 1-Penicillamyl-4-thr-oxytocin 78578-24-2 Oxytocin, 1-(3-mercapto-D-valine)-4-L-threonine- Oxytocin, penicillamyl(1)-thr(4)- Oxytocin, penicillamyl(1)-threonine(4)-