Explanatory notes
… A, phencyclidine (INN) (PCP), phenoperidine (INN), pipradrol (INN), piritramide (INN), propiram (INN), … Fentanyl derivatives containing in their structure, in addition to the unfused piperidine ring, other heterocyclic … of the keto form. Subheading 2933.79 Lactams containing an additional hetero-atom, other than the nitrogen atom of a …