Isotopes other than those of heading no. 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined

284510 Heavy water (deuterium oxide) 284520 Boron enriched in boron-10 and its compounds 284530 Lithium enriched in lithium-6 and its compounds 284540 Helium-3 284590 Isotopes other than those of heading no. 2844, 2845.20, 2845.30 or 2845.40; compounds, inorganic or organic, of such isotopes, whether or not chemically defined