Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 34 Nucleic acids and their salts; Other heterocyclic compounds 29 34 30 Compounds containing in the structure a phenothiazine ring-system (whether or not ...... 29 34 30 00 Compounds containing in the structure a phenothiazine ring-system (whether or not ...... Commodity Code Description 29 34 30 00 000 Compounds containing in the structure a phenothiazine ring-system (whether or not ......