Furanose Sugar Derivative from Germany
Methyl furanoside derivatives feature five-membered oxygen heterocyclic rings from sugar cyclization, used as glycosyl donors in carbohydrate synthesis. Excluded from sugar headings by Chapter 29 priority, classified 2932.99.90.90. Qualifies as chemically defined heterocyclic oxygen compound.
Duty Rate — Germany → United States
21.3%
Rate breakdown
9903.04.6211.3%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• NMR spectra confirming furanose anomeric configuration required
• Reducing sugar test negative prevents classification under Chapter 17
• Protecting group analysis essential for multi-step synthesis intermediates