Atosiban

• CAT Number: I005420
• CAS Number: 90779-69-4
• Molecular Formula: C43H67N11O12S2
• Molecular Weight: 994.2
• Purity: ≥95%
• Synonyms: RW22164; Tractocile
• Target: Vasopressin Receptor
• Solubility: DMSO: ＜ 10.3 mg/mL
• Storage: Store at -20°C
• IUPAC Name: (2S)-N-[(2S)-5-amino-1-[(2-amino-2-oxoethyl)amino]-1-oxopentan-2-yl]-1-[(4R,7S,10S,13S,16R)-7-(2-amino-2-oxoethyl)-13-[(2S)-butan-2-yl]-16-[(4-ethoxyphenyl)methyl]-10-[(1R)-1-hydroxyethyl]-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]pyrrolidine-2-carboxamide
• InChI: InChI=1S/C43H67N11O12S2/c1-5-23(3)35-41(63)53-36(24(4)55)42(64)50-29(20-32(45)56)38(60)51-30(43(65)54-17-8-10-31(54)40(62)49-27(9-7-16-44)37(59)47-21-33(46)57)22-68-67-18-15-34(58)48-28(39(61)52-35)19-25-11-13-26(14-12-25)66-6-2/h11-14,23-24,27-31,35-36,55H,5-10,15-22,44H2,1-4H3,(H2,45,56)(H2,46,57)(H,47,59)(H,48,58)(H,49,62)(H,50,64)(H,51,60)(H,52,61)(H,53,63)/t23-,24+,27-,28+,29-,30-,31-,35-,36-/m0/s1
• InChIKey: VWXRQYYUEIYXCZ-OBIMUBPZSA-N
• SMILES: CC[C@H](C)[C@H]1C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CSSCCC(=O)N[C@@H](C(=O)N1)CC2=CC=C(C=C2)OCC)C(=O)N3CCC[C@H]3C(=O)N[C@@H](CCCN)C(=O)NCC(=O)N)CC(=O)N)[C@@H](C)O InChIKey: VWXRQYYUEIYXCZ-OBIMUBPZSA-N

Atosiban (Cat.No:I005420) is a synthetic peptide used as a tocolytic agent to delay or inhibit premature labor. It acts as an antagonist of the hormone oxytocin, which stimulates uterine contractions. Atosiban competitively binds to the oxytocin receptor, inhibiting the oxytocin-induced contractions. It is commonly administered by injection and has a relatively short half-life.

Reference

[1]. Sanu O, et al. Critical appraisal and clinical utility of atosiban in the management of preterm labor. Ther Clin Risk Manag. 2010 Apr 26;6:191-9. 


[2]. Akerlund M, et al. The effect on the human uterus of two newly developed competitive inhibitors of oxytocin and vasopressin. Acta Obstet Gynecol Scand. 1985;64(6):499-504.