thumb|right|130px|1,3-thiazepine thumb|right|130px|1,4-thiazepine thumb|Diltiazem. 1,4-thiazepine is the seven membered ring in the middle. Thiazepines are substituted thiepins, with a nitrogen replacing a carbon in the seven-membered heterocyclic compound. Depending on the location of the nitrogen, one distinguishes 1,3-thiazepine and 1,4-thiazepine.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).