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Clinical data
ATC code
  • None
CAS Number
PubChem CID
Chemical and physical data
Formula C26H42N4O5S2
Molar mass 554.260 g/mol
3D model (JSmol)

L-368,899 is a drug used in scientific research which acts as a selective antagonist of the oxytocin receptor, with good selectivity over the related vasopressin receptors.[1] Unlike related drugs such as the peripherally selective L-371,257, the oral bioavailabity is high and the brain penetration of L-368,899 is rapid, with selective accumulation in areas of the limbic system. This makes it a useful tool for investigating the centrally mediated roles of oxytocin, such as in social behaviour and pair bonding, and studies in primates have shown L-368,899 to reduce a number of behaviours such as food sharing, sexual activity and caring for infants, demonstrating the importance of oxytocinergic signalling in mediating these important social behaviours.[2][3]

See also[edit]


  1. ^ Williams PD, Anderson PS, Ball RG, Bock MG, Carroll L, Chiu SH, Clineschmidt BV, Culberson JC, Erb JM, Evans BE (March 1994). "1-((7,7-Dimethyl-2(S)-(2(S)-amino-4-(methylsulfonyl)butyramido)bicyclo [2.2.1]-heptan-1(S)-yl)methyl)sulfonyl)-4-(2-methylphenyl)piperaz ine (L-368,899): an orally bioavailable, non-peptide oxytocin antagonist with potential utility for managing preterm labor". Journal of Medicinal Chemistry. 37 (5): 565–71. doi:10.1021/jm00031a004. PMID 8126695. 
  2. ^ Boccia ML, Goursaud AP, Bachevalier J, Anderson KD, Pedersen CA (September 2007). "Peripherally administered non-peptide oxytocin antagonist, L368,899, accumulates in limbic brain areas: a new pharmacological tool for the study of social motivation in non-human primates". Hormones and Behavior. 52 (3): 344–51. doi:10.1016/j.yhbeh.2007.05.009. PMC 2712625Freely accessible. PMID 17583705. 
  3. ^ Smith AS, Agmo A, Birnie AK, French JA (February 2010). "Manipulation of the oxytocin system alters social behavior and attraction in pair-bonding primates, Callithrix penicillata". Hormones and Behavior. 57 (2): 255–62. doi:10.1016/j.yhbeh.2009.12.004. PMC 2824532Freely accessible. PMID 20025881.