Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 33 Heterocyclic compounds with nitrogen hetero-atom(s) only; 29 33 53 Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital,.. 29 33 53 00 Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital,.. Commodity Code Description 29 33 53 00 000 Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital,..