9902.07.55 - (1R,18R,20R,24S,27S)-N-{(1R,2S)-1-[(cyclopropyl- sulfonyl)carbamoyl]-2-vinylcyclopropyl}-7-methoxy-24-(2- methyl-2-propanyl)-22,25-dioxo-2,21-dioxa-4,11,23,26- tetra-azapentacyclo[24.2.1.03,12.05,10.018,20]nonacosa-3,5,7,9,11- pentaene-27-carboxamide (Grazoprevir) (CAS No. 1350514-68-9) (provided in subheading 2935.90.48)

This HTS code, 9902.07.55, specifically classifies Grazoprevir (CAS No. 1350514-68-9), a complex organic chemical compound identified by its detailed IUPAC name. This classification falls under Chapter 99 of the Harmonized Tariff Schedule, which is reserved for temporary legislation, modifications to trade agreements, and additional import restrictions. Therefore, this subheading is not for general product classification but for a specific, temporarily regulated import.

Distinguishing this category from its sibling categories, which primarily cover live animals (e.g., horses, bovine animals, swine, sheep, goats, and poultry), is straightforward. Unlike those broad agricultural categories, 9902.07.55 pertains to a highly specific pharmaceutical substance and its associated import controls, not live commodities. The context of Chapter 99 signifies a departure from standard merchandise classification, indicating that imports under this code are subject to special considerations beyond typical duty rates and require adherence to specific regulatory provisions.

As this is a leaf node within the HTS database, there are no further subcategories. The classification 9902.07.55 is precise, encompassing only the aforementioned Grazoprevir when imported under the specific conditions outlined by the temporary legislation or trade agreement provisions referenced in Chapter 99. Any variations or related compounds would likely be classified under different, separate HTS codes, possibly within Chapter 29 for organic chemicals if not subject to temporary restrictions.