Atosiban (acetate) (Standard) is the analytical standard of Atosiban (acetate). This product is intended for research and analytical applications. Atosiban acetate (RW22164 acetate,RWJ22164 acetate) is a nonapeptide competitive vasopressin/oxytocin receptor antagonist, and is a desamino-oxytocin analogue. Atosiban is the main tocolytic agent and has the potential for spontaneous preterm labor research[1].