Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 33 Heterocyclic compounds with nitrogen hetero-atom(s) only; 29 33 37 N-Phenethyl-4-piperidone (NPP) 29 33 37 00 N-Phenethyl-4-piperidone (NPP) Commodity Code Description 29 33 37 00 000 N-Phenethyl-4-piperidone (NPP)
