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| Formula | C21H21Cl3N4O |
| Molar mass | 451.78 g·mol−1 |
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Rosonabant (INN; E-6776) is a drug acting as a CB1 receptor antagonist/inverse agonist that was under investigation by Esteve as an appetite suppressant for the treatment of obesity. [1] [2] Development of the drug for clinical use was apparently halted shortly after the related CB1 antagonist rimonabant was discovered to have serious adverse effects such as anxiety, clinical depression, and suicidal ideation. [3] [4] [5]