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For traders who think in codes: chapter → heading → code. Each code links to the shelf it is mapped to, if any. This view never replaces or reorders the human shelves — it only links to them.

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HS 293349

Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, other than levorphanol (INN) and its salts

Mapped category: Basic Organic Chemicals

Other codes in heading 2933

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