Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones

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Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient > Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite > Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones