Furanose Sugar Derivative from Canada
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 — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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