| Stereochemistry | ABSOLUTE |
| Molecular Formula | C43H67N11O12S2 |
| Molecular Weight | 994.189 |
| Optical Activity | UNSPECIFIED |
| Defined Stereocenters | 9 / 9 |
| E/Z Centers | 0 |
| Charge | 0 |
SHOW SMILES / InChI
SMILES
[H][C@]1(NC(=O)[C@@]([H])(NC(=O)[C@@H](CC2=CC=C(OCC)C=C2)NC(=O)CCSSC[C@H](NC(=O)[C@H](CC(N)=O)NC1=O)C(=O)N3CCC[C@H]3C(=O)N[C@@H](CCCN)C(=O)NCC(N)=O)[C@@H](C)CC)[C@@H](C)O
InChI
InChIKey=VWXRQYYUEIYXCZ-OBIMUBPZSA-N
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
| Molecular Formula | C43H67N11O12S2 |
| Molecular Weight | 994.189 |
| Charge | 0 |
| Count |
MOL RATIO
1 MOL RATIO (average) |
| Stereochemistry | ABSOLUTE |
| Additional Stereochemistry | No |
| Defined Stereocenters | 9 / 9 |
| E/Z Centers | 0 |
| Optical Activity | UNSPECIFIED |
Atosiban (brand name Tractocile) is a competitive antagonist of human oxytocin at receptor level. In rats and guinea pigs, atosiban was shown to bind to oxytocin receptors, to decrease the frequency of contractions and
the tone of the uterine musculature, resulting in a suppression of uterine contractions. Atosiban was also shown to bind to the vasopressin receptor, thus inhibiting the effect of vasopressin. Tractocile is indicated to delay imminent pre-term birth in pregnant adult women with:
− regular uterine contractions of at least 30 seconds duration at a rate of ≥ 4 per 30 minutes
− a cervical dilation of 1 to 3 cm (0-3 for nulliparas) and effacement of ≥ 50%
− a gestational age from 24 until 33 completed weeks
− a normal foetal heart rate.
Atosiban does not have U.S. Food and Drug
Administration (FDA) approval for use in the United States.
CNS Activity
Originator
Approval Year
PubMed
Patents
Sample Use Guides
Tractocile (Atosiban) is administered intravenously in three successive stages: an initial bolus dose (6.75 mg), performed with Tractocile 6.75 mg/0.9 ml solution for injection, immediately followed by a continuous high dose infusion (loading infusion 300 micrograms/min) of Tractocile 37.5 mg/5 ml concentrate for solution for infusion during three hours, followed by a lower dose of Tractocile 37.5 mg/5 ml concentrate for solution for infusion (subsequent infusion 100 micrograms/min) up to 45 hours. The duration of the treatment should not exceed 48 hours. The total dose given during a full course of Tractocile therapy should preferably not exceed 330.75 mg of atosiban.
Intravenous therapy using the initial bolus injection should be started as soon as possible after diagnosis of pre-term labour. Once the bolus has been injected, proceed with the infusion (See Summary of Product Characteristics of Tractocile 37.5 mg/5 ml, concentrate for solution for infusion). In the case of persistence of uterine contractions during treatment with Tractocile, alternative therapy should be considered.
Route of Administration:
Intravenous
