29333980 (01/1992-12/1996) Compounds, heterocyclic, with nitrogen hetero-atom`s` only, containing an unfused pyridine ring, whether or not hydrogenated, in the structure (excl. pyridine and its salts, piperidine and its salts and iproniazid (INN), ketobemidone hydrochloride `INNM` and pyridostigmine bromide (INN))

Source: Eurostat, Luxembourg

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