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| Formula | C24H32N4O3 | 
| Molar mass | 424.545 g·mol−1 | 
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Secbutonitazene is a benzimidazole derivative which has been sold as a designer drug. It has opioid effects similar to related compounds, having slightly lower potency than metonitazene in vitro, but still more potent than fentanyl. [1] [2]