2933.49.60.00 - Products described in additional U.S. note 3 to section VI

This HTS classification, 2933.49.60.00, covers products that are specifically defined by Additional U.S. Note 3 to Section VI. These are heterocyclic organic compounds containing nitrogen hetero-atoms, characterized by a quinoline or isoquinoline ring system that is not further fused. While this broad category encompasses various quinoline and isoquinoline derivatives, this specific subheading is reserved for those that do not fall under any more specific sub-classifications within this chapter.

This particular subheading is distinct from its sibling category, 2933.49.70.00, which also falls under the "Other" classification for quinoline and isoquinoline ring systems. The distinction between these two "Other" subheadings relies entirely on the explicit conditions outlined in Additional U.S. Note 3 to Section VI, which provides a definitive list or set of criteria for inclusion in 2933.49.60.00. Without further subdivision into specific chemical structures, the key to classifying goods here is strict adherence to the requirements of the aforementioned additional U.S. note.

As this is a leaf node in the HTS classification tree, there are no further subcategories under 2933.49.60.00. Therefore, the classification of goods directly into this subheading requires a thorough review of Additional U.S. Note 3 to Section VI to ensure all stipulated conditions are met. This note serves as the sole defining characteristic and the ultimate authority for determining if a compound with a quinoline or isoquinoline ring system belongs in this specific classification.