2933.99.02.00 - 2-[4-[(6-Chloro-2-quinoxalinyl)oxy]phenoxy]- propionic acid, ethyl ester

This classification covers ethyl ester derivatives of propionic acid substituted with a phenoxy group, which itself is further substituted with a 6-chloro-2-quinoxalinyl moiety. These are complex organic compounds characterized by the presence of multiple heterocyclic ring systems, including quinoxaline and benzene rings, connected through ether and ester linkages. The presence of the ethyl ester of propionic acid is a key structural feature defining this specific product within the broader scope of heterocyclic compounds.

Distinguishing this entry from its siblings, note that 2933.99.02.00 specifically describes the ethyl ester of the named propionic acid derivative. Other entries at this level, such as 2933.99.01.00, cover different ester derivatives (e.g., butyl ester) or entirely different classes of heterocyclic compounds like acridines, indoles, triazoles, benzotriazoles, and carbazoles, which have distinct core structures and chemical properties.

As this is a leaf node within the HTS database, there are no further subdivisions. Therefore, classification under 2933.99.02.00 is final based on the specific chemical name and structure provided, which is 2-[4-[(6-Chloro-2-quinoxalinyl)oxy]phenoxy]- propionic acid, ethyl ester. Proper identification of all constituent chemical groups and linkages is paramount for accurate classification into this precise subheading.