… GENERAL The organo-inorganic compounds covered by headings 29.30 and 29.31 are organic compounds whose molecules contain, in … halogenated derivatives (or compound derivatives). Headings 29.32 to 29.34 cover heterocyclic compounds. The term " …
… 29.33 - Heterocyclic compounds with nitrogen hetero-atom(s) … ring (whether or not hydrogenated) in the structure : 2933.11 - - Phenazone (antipyrin) and its derivatives 2933.19 - - Other - Compounds containing an …
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