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