Cephamycin C Core Intermediate from Mexico
Synthetic cephamycin C nucleus structurally analogous to the named bicyclic beta-lactam in HTS 2934.99.70.00, used in broad-spectrum antibiotic production. Classified as 'other heterocyclic compounds' due to the characteristic 5-thia-1-azabicyclo[4.2.0]octene ring system.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Stereochemistry critical - provide X-ray crystallography or NMR confirming beta-lactam ring integrity
• Controlled substance precursor monitoring may apply; maintain 3-year import records
• Beta-lactam allergens require specific worker safety documentation for US facilities