Carbostyril (4-Quinolone Derivative) from Mexico
Carbostyril derivatives serve as intermediates for aromatic amide drugs like fluoroquinolones. Classified under HTS 2924.29.62.50 as 'other' aromatic cyclic amides used in pharmaceuticals. Structure contains fused cyclic amide ring per chapter 29 specifications.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Register as Type II DMF for intermediates
• Declare synthetic route to avoid dual-use scrutiny