Arformoterol Tartrate (CAS No. 200815-49-2) in bulk powder form. Arformoterol Tartrate is a selective beta2-adrenergic bronchodilator. It is indicated for the long term maintenance treatment of bronchoconstriction in patients with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and emphysema. In your letter, you indicated Arformoterol Tartrate will be imported in polymorphic form D.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N308881