Atosiban Acetate

Atosiban, also known as ORF 22164, RWJ 22164, is an inhibitor of the hormones oxytocin and vasopressin. It is used as an intravenous medication as a labour repressant (tocolytic) to halt premature labor. Although initial studies suggested it could be used as a nasal spray and hence would not require hospital admission, it is not used in that form.

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CAT#	R1968
Chemical Structure
CAS	914453-95-5
Synonyms/Alias	ORF-22164; ORF 22164; ORF22164; RWJ-22164; RWJ 22164; RWJ22164; Atosiban. trade names Tractocile, Antocin, atosiban SUN; deamino-cysteinyl-O4-ethyl-D-tyrosyl-L-isoleucyl-L-threonyl-L-asparagyl-L-cysteinyl-L-prolyl-L-ornithyl-glycinamide (1->6)-disulfide acetic acid
Chemical Formula	acetic acid;(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
M.F/Formula	C45H71N11O14S2
M.W/Mr.	1054.2
Sequence	One Letter Code: CXITNCPXG Three Letter Code: deamino-Cys(1)-D-Tyr(Et)-Ile-Thr-Asn-Cys(1)-Pro-Orn-Gly-NH2.CH3CO2H
Appearance	Solid powder
Activity	Agonist
Target	Oxytocin Receptor

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InChI	InChI=1S/C43H67N11O12S2.C2H4O2/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;1-2(3)4/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);1H3,(H,3,4)/t23-,24+,27-,28+,29-,30-,31-,35-,36-;/m0./s1
InChI Key	SVDWBHHCPXTODI-QIWYXCRTSA-N
Canonical SMILES	CCC(C)C1C(=O)NC(C(=O)NC(C(=O)NC(CSSCCC(=O)NC(C(=O)N1)CC2=CC=C(C=C2)OCC)C(=O)N3CCCC3C(=O)NC(CCCN)C(=O)NCC(=O)N)CC(=O)N)C(C)O.CC(=O)O
Isomeric 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.CC(=O)O