Explanatory notes
… Concentrates of poppy straw; buprenorphine (INN), codeine, dihydrocodeine (INN), ethylmorphine, etorphine (INN), heroin, hydrocodone (INN), hydromorphone (INN), morphine, … heading also excludes saps and vegetable extracts, such as dried saps of opium ( heading 13.02 ). This heading includes …