Nucleic Acids, Their Salts & Other Heterocyclic Compounds (NESOI)

The US schedule separates compounds by primary end-use function: lines 2934991200 through 2934991800 cover compounds used as fungicides, herbicides, insecticides, and other pesticides, while 2934993000 and 2934994700 cover aromatic and non-aromatic drug compounds. Classification follows the compound's principal use at the time of importation, supported by technical data sheets, EPA registration numbers for pesticides, or FDA drug master file references for pharmaceutical actives. When a compound has dual-use potential, binding ruling requests to CBP are advisable.

Mycophenolate mofetil (2934990100) is an immunosuppressant drug substance and therefore subject to FDA admissibility review as an imported drug. The foreign manufacturer must be registered with FDA, and the substance must conform to applicable pharmacopeial or drug master file specifications. It is not a DEA-scheduled substance, but FDA may detain shipments from unregistered establishments or those with prior import alerts. Consult a licensed customs broker or regulatory counsel familiar with FDA drug import procedures before arranging shipment.