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Harmonized System
Section VI > Chapter 29 > Heading 2933
Explanatory notes
… 2933.49 - - Other - Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine … ring in the structure : 2933.52 - - Malonylurea (barbituric acid) and its salts 2933.53 - - Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital , cyclobarbital (INN), …Section VI > Chapter 28 > Heading 2811
… Other inorganic acids and other inorganic oxygen compounds of non-metals. …