Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 26 Nitrile-function compounds 29 26 30 Fenproporex (INN) and its salts; methadone (INN) intermediate (4-cyano-2-dimethylamino.. 29 26 30 00 Fenproporex (INN) and its salts; methadone (INN) intermediate (4-cyano-2-dimethylamino.. Commodity Code Description 29 26 30 00 000 Fenproporex (INN) and its salts; methadone (INN) intermediate (4-cyano-2-dimethylamino..