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Top 20 Directory:
Top : Science : Instruments_and_Supplies : Isotopes : NMR_Solvents
Sites:
  		• C/D/N ISOTOPES: Quite a large listing of deuterated compounds and Carbon-13 and Nitrogen-15 labelled compounds. In English or German or French.
  		• Cambridge Isotope Laboratories: Manufacturer of stable isotope labeled compounds and some fine deuterated solvents too.
  		• Isotec: Makes some of the most unique and novel labeled compounds
  		• Medical Isotopes, Inc.: Nearly a complete line of enriched biochemicals. Nice selection of fatty acids, enriched with C13.
  		• NMR Shift Reagents: Supplier of NMR shift reagents.
  		• Silantes GmbH: Stable isotope labeled biopolymers (H2, C13, N15)
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