1-(3-Mercapto-3-methylbutanoic acid)-8-L-ornithineoxytocin 1-Deaminopenicillamyl-8-orn-oxytocin 72915-18-5 Oxytocin, 1-(3-mercapto-3-methylbutanoic acid)-8-L-ornithine- Oxytocin, 1-desaminopenicillamyl-orn(8)- Oxytocin, 1-desaminopenicillamyl-ornithine(8)- dPOVT