... > SECTION VI - PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES > CHAPTER 29 - ORGANIC CHEMICALS > X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS, AND SULPHONAMIDES > 2934 Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds > Compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused > Other