Oxytocin antiparallel dimer TFA is a homo peptide dimer connected by a disulfide bridge, exhibiting activities similar to oxytocin and vasopressin but with reduced toxicity [1] [2].

催产素与脱氨基催产素形成的平行与反平行同质与异质二聚体中双胱氨酸的生物活性仅相当于催产素的0.2%-6% [1]。

催产素二聚体（静脉注射；单剂量）在大鼠中表现出的急性毒性较催产素为低（LD50=43 mg/kg对比催产素的25 mg/kg）[2]。