133851-41-9 OMCPTA Oxytocin, 1-(1-mercaptocyclohexaneacetic acid)-2-L-tryptophan-8-L-arginine- Oxytocin, beta mercapto-beta,beta-cyclopentamethylenepropionic acid-trp(2)-arg(8)- Oxytocin, beta mercapto-beta,beta-cyclopentamethylenepropionic acid-tryptophyl(2)-arginine(8)- beta-Mercapto-beta,beta-cyclopentamethylenepropionic acid-2-trp-8-arg-oxytocin