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Details

Stereochemistry ABSOLUTE
Molecular Formula C27H25ClF3N3O2
Molecular Weight 515.955
Optical Activity UNSPECIFIED
Defined Stereocenters 2 / 2
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of TARANABANT

SMILES

C[C@H](NC(=O)C(C)(C)OC1=CC=C(C=N1)C(F)(F)F)[C@@H](CC2=CC=C(Cl)C=C2)C3=CC=CC(=C3)C#N

InChI

InChIKey=QLYKJCMUNUWAGO-GAJHUEQPSA-N
InChI=1S/C27H25ClF3N3O2/c1-17(34-25(35)26(2,3)36-24-12-9-21(16-33-24)27(29,30)31)23(14-18-7-10-22(28)11-8-18)20-6-4-5-19(13-20)15-32/h4-13,16-17,23H,14H2,1-3H3,(H,34,35)/t17-,23+/m0/s1

HIDE SMILES / InChI

Description

Taranabant is a highly selective cannabinoid-1 (CB1) receptor inverse agonist developed by Merck & Co for the treatment of obesity. The Phase III taranabant study involved about 2,400 patients and was to be conducted for two years. In March 2008, after completion of 52 weeks of the study, Merck reported positive results of the drug in conjunction with diet and exercise in obese patients. The patients experienced double the amount of weight loss by taking 2mg of taranabant when compared to the patients treated with placebo. However, in October 2008, the company discontinued the Phase III programme and clinical development of taranabant because of its side effects. The drug showed gastrointestinal and psychiatric side effects such as increased anxiety, depression and irritability. Merck had previously planned to file for regulatory approval with the US Food and Drug Administration in 2008, but subsequently withdrew it.

CNS Activity

Originator

Approval Year

Targets

Primary TargetPharmacologyConditionPotency
0.3 nM [IC50]

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
Unknown

Cmax

ValueDoseCo-administeredAnalytePopulation
49.99 nM
5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
147.55 nM
25 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
85.62 nM
10 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
58.24 nM
7.5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens

AUC

ValueDoseCo-administeredAnalytePopulation
265.2 nM × h
5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
806.3 nM × h
25 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
416.4 nM × h
10 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
298.3 nM × h
7.5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens

T1/2

ValueDoseCo-administeredAnalytePopulation
90.5 h
5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
103.6 h
25 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
97.4 h
10 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens
93.3 h
7.5 mg 1 times / day steady-state, oral
TARANABANT plasma
Homo sapiens

Drug as perpetrator​

Drug as victim

Tox targets

PubMed

Patents

Sample Use Guides

In Vivo Use Guide
0.5 mg capsule, 1 mg capsule, 2 mg capsule once daily. Treatment for 52 weeks.
Route of Administration: Oral
In Vitro Use Guide
In vitro, taranabant (10(-10) -10(-7) mol/L) increased contractile responses in mouse ileum and blocked the effect of the CB agonist WIN 55,212-2.